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Evolution (Evidence for Evolution (Patterns in the Fossil Record, Pattern…
Evolution
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Mechanisms
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Natural Selection- Occurs because there is variation, heredity, and the environment cannot sustain unlimited population growth.
Anatomical Evidence
Their bodies have been modified and parts have been lost through natural selection, resulting in adaptation to their lifestyles.
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Homologous structures-similar structures in related organisms that are a result of a common ancestry
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Micro Evolution
This occurs over short periods of time, such as one generation to the next
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Fossil Evidence
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Transitional Form-Organisms that show the intermediate states between an ancestral form and that of its decendants
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Homologous
Characteristics in different organisms that are similar because they were inherited from a common ancestor that also had that character.
Analogous
Have separate evolutionary origins, but are superficially similar because they both experienced natural selection that shaped them in a similar way