A2 OCR Biology - Unit 2 Module 3 Revision Test
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A2 OCR Biology - Unit 2 Module 3 Revision Test
- 1. A2 OCR Biology UNIT 2 – Module 3 Ecosystems – Revision Quiz Total: ____ / 50 ____ % Scan this QR code with your smartphone to take you the relevant section of mrexham.com
- 2. 1. Define the term population (1) ..................................................................................................................... ..................................................................................................................... 2. Define the term community (1) ..................................................................................................................... ..................................................................................................................... 3. What term would you use to define the role each species plays in an ecosystem? (1) ..................................................................................................................... 4. List three abiotic factors that can affect an ecosystem (2) ..................................................................................................................... ..................................................................................................................... 5. What type of organisms feed on waste material or dead organisms? (1) ..................................................................................................................... 6. What term describes the level at which an organism feeds in a food chain? (1) ..................................................................................................................... 7. Where does all the energy in a food chain initially come from? (1) .....................................................................................................................
- 3. 8. Name three types of pyramid that can be used to represent a food chain (3) ..................................................................................................................... ..................................................................................................................... ..................................................................................................................... 9. What units do you use for productivity? (1) ..................................................................................................................... 10.Define the term Net Primary Productivity (2) ..................................................................................................................... ..................................................................................................................... 11.Give three ways to improve primary productivity? (3) ..................................................................................................................... ..................................................................................................................... ..................................................................................................................... 12.Give two ways of improving secondary productivity? (2) ..................................................................................................................... ..................................................................................................................... 13.Define the term succession (1) .....................................................................................................................
- 4. 14.What term is used to describe the species that first colonise a new habitat? (1) ..................................................................................................................... 15.What term is used to describe the final stage of succession? (1) ..................................................................................................................... 16.Name three plants that are involved in sand dune succession (3) ..................................................................................................................... ..................................................................................................................... 17.What is a saprotroph (1) ..................................................................................................................... 18.What is the name of the nitrogen fixing bacteria that live in root nodules? (1) ..................................................................................................................... 19.What type of relationship do they have with the plant? (1) ..................................................................................................................... 20.What type of bacteria cause nitrification? (1) ..................................................................................................................... 21.What process is it when the ammonium gets converted to nitrites? (1) .....................................................................................................................
- 5. 22.Define the term carrying capacity (2) ..................................................................................................................... ..................................................................................................................... ..................................................................................................................... 23.Name two techniques used to manage small scale timber production (2) ..................................................................................................................... ..................................................................................................................... 24.What type of organisms tend to adopt the r-strategy for population growth?(1) ..................................................................................................................... 25.What happens at the log phase of population growth (2) ..................................................................................................................... ..................................................................................................................... 26.Define the term intraspecific competition (1) ..................................................................................................................... 27.What idea did Gause form about interspecific competition (1) ..................................................................................................................... .....................................................................................................................
- 6. 28.What are the three principals for managing large scale timber production (3) ..................................................................................................................... ..................................................................................................................... ..................................................................................................................... 29.Give three examples of management strategies used in conservation (3) ..................................................................................................................... ..................................................................................................................... ..................................................................................................................... 30.Give two ways the human population has threatened biodiversity (2) ..................................................................................................................... ..................................................................................................................... 31.Give the three species introduced by humans to the Galapagos islands (3) ..................................................................................................................... ..................................................................................................................... ..................................................................................................................... END OF TEST