Evolution by Natural Selection

Fossils provide evidence for evolution earth has

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Unformatted text preview: scribed evolution as descent with modification Upheld that species do change Species are related by common ancestry 24.2: The Pattern of Evolution: Have Species Changed through Time? Fossils provide evidence for evolution Earth has existed for billions of years Observe through radioactive dating of types of rocks Transitional feature: trait that is intermediate between younger and older species Vestigial Structures provide evidence for evolution Ex: Ostriches have reduced wings Homology: the study of “likeness” Genetic homology Developmental homology Structural homology 24.3: The Process of Evolution: How does Natural Selection Work? Darwin recognized natural selection Explains the pattern of descent with modification Evolution seen as change in allele frequencies in a population Defined fitness as how many offspring one can produce Adaptation is a trait th...
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This note was uploaded on 02/06/2014 for the course BIO 104 taught by Professor Matthewhamilton during the Spring '11 term at Georgetown.

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