Evolution Notes for Biology II

1. Photo by “davemee” flickr creative commons "nothing in biology makes sense except in the light of evolution” ~Theodosius Dobzhansky (1900-1975)

3. They can be used to make predictions

5. Why is the sequence of DNA very similar in some groups of organisms but not in others?

9. Some thought that you would gain or lose features if you overused or didn't use them,

10. PROVEN TO BE WRONG!Photo courtesy of ucumari, creative commons, flickr

12. He traveled the world and made observations and sketches of many species

14. Finch, photo courtesy of stirwise, flickr, creative commons Giant tortoise, photo courtesy of Planetgordon, flickr creative commons

16. He concluded that the finches all came from one ancestral species and evolved into many new speciesCactus finch, photo courtesy of zrim, flickr creative commons

20. During a particularly hot year, food became less abundant (competition), blobs that had the ability to dig into the soil to get food had a better chance of survival. Many blobs died that year…….

21. The ones that survived mated and passed their genes to the next generation. (reproduction)

22. The next generation had move blobs with the pointed noses. That is NATURAL SELECTION. Variation Competition Survival Reproduction

24. Shows similarities between extinct animals and animals that are alive today

29. Embryological Development Embryos of different species develop in almost identical ways. Human fetus at 8 weeks

30. Direct observation of species change Bacteria become resistant to antibiotics Wolves were bred over many generations to become dogs (artificial selection) • and then bred further to create a variety of breeds

32. It is NOT a theory because it does not follow scientific principles (theories require evidence, and must be based on NATURAL PHENOMENON)

34. Ask your religious leaders what their thoughts are.Also see the National Center for Science Education for a list of statements from a variety of religious groups.