bio chapter 20 vocab answer key.docx - artificial selection the process of directed breeding to produce offspring with desired traits natural selection

bio chapter 20 vocab answer key.docx - artificial selection...

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artificial selection the process of directed breeding to produce offspring with desired traits. natural selection theory of evolution developed by Darwin, based on four ideas: excess reproduction, variations, inheritance, and the advantages of specific traits in an environment. that explain how traits of a population can change over time. evolution hereditary changes in groups of living organisms over time. derived trait new feature that had not appeared in common ancestors. ancestral trait more-primitive characteristic that appeared in common ancestors. ex/teeth, tails. homologous structure anatomically similar structure inherited from a common ancestor. ex/ birds wings reptile limbs. vestigial structure reduced form of a functional structure that indicates shared ancestry. ex. kiwi wings human appendix. analogous structure structure that has the same function but different construction and was not inherited from a common ancestor.
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