Monday, April 5, 2010
Remnants and Creationism
Vestigal traits are discussed starting on page 56 and explained as a trait that "no longer performs the function for which it evolved" (page 58). The example of an ostrich is given because it does not use its wings to fly however it does use them to balance when running and as a warning to enemies. Therefore how is it decided that the wings are a vestigal trait of the ostrich since they are indeed performing a function? How is it decided that the wings did not evolve to help balance the ostrich instead of flying? What are the criteria for a vestigal trait? What are the criteria to classify a trait as an atavism?Then discuss how creationism discards vestigal traits as support for evolution.