Wednesday, March 10, 2010
Coyne explains what atavisms are from pages 64-66 and why they are strong evidence for evolution. "True atavisms must recapitulate an ancestral trait, and in a fairly exact way" (64). These are different from vestigial traits since their occurrence is not seen in every organism of a species, but every once in a while. What are some examples that are provided in the book and how are scientists able to use this as evidence for proving that evolution is true? Also, with all the studies that have been done on birds in the past showing that they can produce teeth, what other organisms may be the target to new experiments and why? On the other hand, if you do not believe scientists will try to bring back past traits from organisms, please explain why. (Hint: think about the definition of evolution and adaptations to the gradually changing environment of present time).