Detailed walkthrough on how you can break down a Science RC passage on the GMAT. Event was hosted by BeatTheGMAT.com

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4. In their relationship to the general ecology of the reefs, the Mollusca as a group of animals play a highly significant role. Because of the nature of their shells, mollusc remains may be found among the limestone debris of a reef dating back to its very earliest stages of evolution in the geological past, and may, therefore, be considered as having aided in its construction. Yet, as boring organisms, in both living and dead coral, certain species of molluscs rank among the most destructive agents to be found on the reefs. Mollusc eggs are laid in tens of millions, and the floating larval stages form a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ).

5. In their relationship to the general ecology of the reefs, the Mollusca as a group of animals play a highly significant role. Because of the nature of their shells, mollusc remains may be found among the limestone debris of a reef dating back to its very earliest stages of evolution in the geological past, and may, therefore, be considered as having aided in its construction. Yet, as boring organisms, in both living and dead coral, certain species of molluscs rank among the most destructive agents to be found on the reefs. Mollusc eggs are laid in tens of millions, and the floating larval stages form a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). The first paragraph – figure out general topic

6. In their relationship to the general ecology of the reefs, the Mollusca as a group of animals play a highly significant role. Because of the nature of their shells, mollusc remains may be found among the limestone debris of a reef dating back to its very earliest stages of evolution in the geological past, and may, therefore, be considered as having aided in its construction. Yet, as boring organisms, in both living and dead coral, certain species of molluscs rank among the most destructive agents to be found on the reefs. Mollusc eggs are laid in tens of millions, and the floating larval stages form a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). In this case, biology is the general topic

7. In their relationship to the general ecology of the reefs, the Molluscaas a group of animals play a highly significant role. Because of the nature of their shells,molluscremains may be found among the limestone debris of a reef dating back to its very earliest stages of evolution in the geological past, and may, therefore, be considered as having aided in its construction. Yet, as boring organisms, in both living and dead coral, certain species of molluscs rank among the most destructive agents to be found on the reefs. Mollusc eggs are laid in tens of millions, and the floating larval stages form a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). Find your “hero” or “lead actor”

8. In their relationship to the general ecology of the reefs, the Mollusca as a group of animals play a highly significant role. Because of the nature of their shells, mollusc remains may be found among the limestone debris of a reef dating back to its very earliest stages of evolution in the geological past, and may, therefore, be considered as having aided in its construction. Yet, as boring organisms, in both living and dead coral, certain species of molluscs rank among the most destructive agents to be found on the reefs. Mollusc eggs are laid in tens of millions, and the floating larval stages form a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). Tracking structure: connectors

9. In their relationship to the general ecology of the reefs, the Mollusca as a group of animals play a highly significant role. Because of the nature of their shells, mollusc remains may be found among the limestone debris of a reef dating back to its very earliest stages of evolution in the geological past, and may, therefore, be considered as having aided in its construction. Yet, as boring organisms, in both living and dead coral, certain species of molluscs rank among the most destructive agents to be found on the reefs. Mollusc eggs are laid in tens of millions, and the floating larval stages form a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). Tracking structure: connectors

10. In their relationship to the general ecology of the reefs, the Mollusca as a group of animals play a highly significant role. Because of the nature of their shells, mollusc remains may be found among the limestone debris of a reef dating back to its very earliest stages of evolution in the geological past, and may, therefore, be considered as having aided in its construction. Yet, as boring organisms, in both living and dead coral, certain species of molluscs rank among the most destructive agents to be found on the reefs. Mollusc eggs are laid in tens of millions, and the floating larval stages form a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). Tracking structure: connectors

11. In their relationship to the general ecology of the reefs, the Mollusca as a group of animals play a highly significant role. Because of the nature of their shells, mollusc remains may be found among the limestone debris of a reef dating back to its very earliest stages of evolution in the geological past, and may, therefore, be considered as having aided in its construction. Yet, as boring organisms, in both living and dead coral, certain species of molluscs rank among the most destructive agents to be found on the reefs. Mollusc eggs are laid in tens of millions, and the floating larval stages form a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). Tracking structure: connectors

12. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the

13. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the Second paragraph: general to more specific

14. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the Second paragraph: general to more specific Molluscs

15. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the Second paragraph: general to more specific Molluscs Bivalves

16. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the Tracking structure: connectors

17. also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the edges of the shell valves pointing upwards. The result of this mode of living is that the internal organs in their relationship to the mantle and shell differ from those of all other bivalve molluscs. The mantle tissue, by reason of the animal’s way of life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. Tracking structure: paragraph transition

18. also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the edges of the shell valves pointing upwards. The result of this mode of living is that the internal organs in their relationship to the mantle and shell differ from those of all other bivalve molluscs. The mantle tissue, by reason of the animal’s way of life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. Tracking structure: paragraph transition

19. It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the edges of the shell valves pointing upwards. The result of this mode of living is that the internal organs in their relationship to the mantle and shell differ from those of all other bivalve molluscs. The mantle tissue, by reason of the animal’s way of life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. Source of difficulty: wording

20. It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the edges of the shell valves pointing upwards. The result of this mode of living is that the internal organs in their relationship to the mantle and shell differ from those of all other bivalve molluscs. The mantle tissue, by reason of the animal’s way of life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. Source of difficulty: wording

21. It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the edges of the shell valves pointing upwards. The result of this mode of living is that the internal organs in their relationship to the mantle and shell differ from those of all other bivalve molluscs. The mantle tissue, by reason of the animal’s way of life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. Zooming in on a particular category Molluscs

22. It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the edges of the shell valves pointing upwards. The result of this mode of living is that the internal organs in their relationship to the mantle and shell differ from those of all other bivalve molluscs. The mantle tissue, by reason of the animal’s way of life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. Zooming in on a particular category Molluscs Bivalves

23. It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the edges of the shell valves pointing upwards. The result of this mode of living is that the internal organs in their relationship to the mantle and shell differ from those of all other bivalve molluscs. The mantle tissue, by reason of the animal’s way of life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. Zooming in on a particular category Molluscs Bivalves “Tri”

24. life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. The distinguishing features

25. life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. The distinguishing features

26. life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. The distinguishing features: feeding

27. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

28. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution Detail question

29. 1. According to this passage, the ability of the clams of the family Tridacnidaeto harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

30. 1. According to this passage, the ability of the clams of the family Tridacnidaeto harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution Look for clues: words that you recognize from the passage

31. 1. According to this passage, the ability of the clams of the family Tridacnidaeto harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution Look for clues: words that you recognize from the passage …the method of feeding that the clams of the family Tridacnidae display their remarkable adaptation… …mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the…

32. 1. According to this passage, the ability of the clams of the family Tridacnidaeto harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution …the method of feeding that the clams of the family Tridacnidae display their remarkable adaptation… …mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the… 3rd paragraph

33. life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. Quickly skim through the passage if you need to

34. life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of…

35. life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of…

36. life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of… (A) symbiosis

37. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

38. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

39. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution On test day, move on

40. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

41. It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the edges of the shell valves pointing upwards. The result of this mode of living is that the internal organs in their relationship to the mantle and shell differ from those of all other bivalve molluscs. The mantle tissue, by reason of the animal’s way of life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams.

42. It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the edges of the shell valves pointing upwards. The result of this mode of living is that the internal organs in their relationship to the mantle and shell differ from those of all other bivalve molluscs. The mantle tissue, by reason of the animal’s way of life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams.

43. It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the edges of the shell valves pointing upwards. The result of this mode of living is that the internal organs in their relationship to the mantle and shell differ from those of all other bivalve molluscs. The mantle tissue, by reason of the animal’s way of life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. (B) contradicts the passage

44. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

45. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

46. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

47. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the Bivalves are mentioned in the 2nd paragraph

48. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the No mention of the zooxanthellae

49. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

50. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

51. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

52. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the Oxygen is discussed in the 2nd paragraph

53. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the Same issue: no zooxanthellae

54. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

55. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

56. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

57. It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the edges of the shell valves pointing upwards. The result of this mode of living is that the internal organs in their relationship to the mantle and shell differ from those of all other bivalve molluscs. The mantle tissue, by reason of the animal’s way of life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams.

58. It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the edges of the shell valves pointing upwards. The result of this mode of living is that the internal organs in their relationship to the mantle and shell differ from those of all other bivalve molluscs. The mantle tissue, by reason of the animal’s way of life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams.

59. It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the edges of the shell valves pointing upwards. The result of this mode of living is that the internal organs in their relationship to the mantle and shell differ from those of all other bivalve molluscs. The mantle tissue, by reason of the animal’s way of life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. Evolution = structural modifications

60. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

61. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

62. 1. According to this passage, the ability of the clams of the family Tridacnidae to harbor microscopic zooxanthellae in their mantles is an illustration of (A) symbiosis (B) an inability to adapt to one’s environment (C) bivalve function (D) oxygen replenishment (E) evolution

63. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms.

64. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms. Detail question

65. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms. Look for clues: words that help you narrow it down to a paragraph

66. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms. Look for clues: words that help you narrow it down to a paragraph … they have no differentiated head region and no radula (tonguelike organ).

67. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms. Look for clues: words that help you narrow it down to a paragraph … they have no differentiated head region and no radula (tonguelike organ). 2nd paragraph

68. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the Short paragraph

69. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the Bivalve molluscs possess neither differentiated heads nor radulafor which of the following reasons?

70. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the Bivalve molluscs possess neither differentiated heads nor radulafor which of the following reasons? (C) They strain plankton through their gills, which eliminates the need for a differentiated head and radula.

71. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms.

72. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms.

73. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms. Locomotion is not mentioned anywhere in the passage

74. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms.

75. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms.

76. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms. Antennae are not mentioned anywhere in the passage either

77. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms.

78. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms.

79. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms.

80. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the

81. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the Filterfeeding is distinctively mentioned as a method of getting food

82. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms.

83. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms.

84. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms.

85. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms. “Apiary” is not mentioned in the text, nor are relationships with other organisms

86. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms.

87. 2. Bivalve molluscs possess neither differentiated heads nor radula for which of the following reasons? Better locomotion on the ocean floor is accomplished without the need for a differentiated head or radula. Visual apparatus is located in antennae, which obviates the need for a differentiated head or radula. They strain plankton through their gills, which eliminates the need for a differentiated head and radula. They trap their prey by closing their hinged shell, which performs all the functions of a differentiated head and radula. These apiary would interfere with their symbiotic relationships with other organisms.

88. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef

89. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef General question

91. tone

92. topic… and others

93. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef Tests your overall understanding of the passage. Most of the time, you should eliminate choices one by one

94. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef

95. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the

96. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the

97. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the

98. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the Option is too narrow

99. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef

100. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef

101. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef

102. In their relationship to the general ecology of the reefs, the Mollusca as a group of animals play a highly significant role. Because of the nature of their shells, mollusc remains may be found among the limestone debris of a reef dating back to its very earliest stages of evolution in the geological past, and may, therefore, be considered as having aided in its construction. Yet, as boring organisms, in both living and dead coral, certain species of molluscs rank among the most destructive agents to be found on the reefs. Mollusc eggs are laid in tens of millions, and the floating larval stages form a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ).

103. In their relationship to the general ecology of the reefs, the Mollusca as a group of animals play a highly significant role. Because of the nature of their shells, mollusc remains may be found among the limestone debris of a reef dating back to its very earliest stages of evolution in the geological past, and may, therefore, be considered as having aided in its construction. Yet, as boring organisms, in both living and dead coral, certain species of molluscs rank among the most destructive agents to be found on the reefs. Mollusc eggs are laid in tens of millions, and the floating larval stages form a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ).

104. In their relationship to the general ecology of the reefs, the Mollusca as a group of animals play a highly significant role. Because of the nature of their shells, mollusc remains may be found among the limestone debris of a reef dating back to its very earliest stages of evolution in the geological past, and may, therefore, be considered as having aided in its construction. Yet, as boring organisms, in both living and dead coral, certain species of molluscs rank among the most destructive agents to be found on the reefs. Mollusc eggs are laid in tens of millions, and the floating larval stages form a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). Option is too narrow

105. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef

106. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef

107. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef

108. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef “Tropical Seas” are mentioned towards the end of the passage passage

109. life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams. Too brief of a mention to justify title

110. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef

111. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef

112. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef

113. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef Combines elements of the 1st, 2nd and 3rd passages

114. In their relationship to the general ecology of the reefs, the Mollusca as a group of animals play a highly significant role. Because of the nature of their shells, mollusc remains may be found among the limestone debris of a reef dating back to its very earliest stages of evolution in the geological past, and may, therefore, be considered as having aided in its construction. Yet, as boring organisms, in both living and dead coral, certain species of molluscs rank among the most destructive agents to be found on the reefs. Mollusc eggs are laid in tens of millions, and the floating larval stages form a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ).

115. In their relationship to the general ecology of the reefs, the Mollusca as a group of animals play a highly significant role. Because of the nature of their shells, mollusc remains may be found among the limestone debris of a reef dating back to its very earliest stages of evolution in the geological past, and may, therefore, be considered as having aided in its construction. Yet, as boring organisms, in both living and dead coral, certain species of molluscs rank among the most destructive agents to be found on the reefs. Mollusc eggs are laid in tens of millions, and the floating larval stages form a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ).

116. In their relationship to the general ecology of the reefs, the Mollusca as a group of animals play a highly significant role. Because of the nature of their shells, mollusc remains may be found among the limestone debris of a reef dating back to its very earliest stages of evolution in the geological past, and may, therefore, be considered as having aided in its construction. Yet, as boring organisms, in both living and dead coral, certain species of molluscs rank among the most destructive agents to be found on the reefs. Mollusc eggs are laid in tens of millions, and the floating larval stages form a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ).

117. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the

118. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the

119. a very important part of the zooplankton that sustains life in the waters over the reefs. In their vast numbers, as herbivores and carnivores, the molluscs are both prey and predator on the reefs. Most molluscs obtain their oxygen directly from the seawater by means of gills in the mantle cavity. Molluscs with two valves, or shells, hinged together are referred to as bivalves. In bivalves the gills have become so developed that in many species they also act as the food-catching apparatus. Because most bivalves are filterfeeding animals, sieving minute organisms from the surrounding seawater, they have no differentiated head region and no radula (tonguelike organ). It is in the method of feeding that the clams of the family Tridacnidae display their remarkable adaption to their environment. In the course of their evolution, the various members have become structurally modified to best enable them to develop in their particular habitat. These clams normally live with the animal lying on the hinge side of the shell, and the

120. life, is capable of considerable expansion, and is exposed to the direct rays of the sun to the greatest possible extent. This is undoubtedly associated with the most unusual feature of all displayed by these remarkable molluscs: Within this mantle tissue are millions of tiny zooxanthellae, closely resembling the symbiotic algae found in the corals and the alcyonarians. It has been definitely established that these zooxanthellae form a considerable part of the diet of the Tridacnas, and the modifications found in these molluscs indicate that they are not only specialized for harboring these minute algae, but that they also deliberately “farm” them. This must surely be one of the most fascinating examples of symbiosis to be found in nature. The whole ecology of the clams, bound exclusively to warm, shallow waters of tropical seas, appears linked to an increase in the efficiency of that symbiosis, which gives food and protection to the algae and very considerable additional nutrient from its symbionts to the clams.

121. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef

122. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef

123. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas Role of Molluscs in the Reef Ecosystem Molluscs and Coelenterates of the Coral Reef “Coelenterates” are never mentioned in the text

124. 3. An appropriate title for this passage would be Filter Feeding in Bivalve Molluscs Plankton in Coral Reef Ecology Prey and Predator in the Tropical Seas