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Differences in Evolution

Differences in Evolution . Remember evolution means change over time…. Natural Selection . Artificial Selection . Artificial is selective breeding by humans Humans decides who/what lives or dies based traits they find more desirable

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Differences in Evolution

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  1. Differences in Evolution

  2. Remember evolution means change over time… Natural Selection Artificial Selection Artificial is selective breeding by humans Humans decides who/what lives or dies based traits they find more desirable They hope its offspring will produce the same traits as well. • Natural is something made by nature • Nature decides the organisms with the best traits to survive and reproduces

  3. Homologous Structures • Homologous structures: structures with different appearances and functions that all derived from the same body part in a common ancestor • The bones in the forelimb of mammals are homologous structures • Different functions, same ancestor structure

  4. Homology of the bones of the forelimb of mammals

  5. Human hand Mole foot Bat wing Fly wing Homologous structures are different than Analogous Structures • Analogous structures have a similar function. • Analogous structures are not evidence of a common ancestor.

  6. Vestigial structures of a whale Vestigial structures • have no apparent function, but resemble structures their ancestors possessed

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