BIO120H1 Chapter Notes - Chapter 1-9: Feathered Dinosaur, Vestigiality, Transitional Fossil
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BIO120H1 Full Course Notes
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Document Summary
Plants and animals seem designed for living lives. Implies master mechanic (18th century english philosopher william paley) Darwin raised question of design before disposing of it. Looked beyond obvious, suggesting and supporting two ideas that dispelled idea of design: evolution and natural selection. Not the first to think of evolution, but first to use data from nature to convince people that evolution was true. Statement consists of 6 components: evolution, gradualism, speciation, common ancestry, natural selection, nonselective mechanisms of evolutionary change: evolution. Over many generations, a species can evolve into something different, and those differences are based on changes in dna, which originate as mutations. Species of plants and animals living today are descended from those that lived earlier. Evolution doesn"t predict that species will constantly be evolving, or how fast (depends on evolutionary pressures: gradualism. Takes many generations to produce substantial evolutionary change. Evolution of new features occurs over hundreds or thousands or millions of generations.
