Ant 1 April 8 2008

Ant 1 April 8 2008 - Adaptation and natural selection...

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Adaptation and natural selection  Paradigm shift - A change from one way of thinking to another Not all traits are necessary for adaptation  Adaptation: a TRAIT (structure of behavior) that shows  evidence of having been designed to serve a function (a  benefit to survival or reproduction) To examine if a trait is for adaptation - Evidence of design Is it for a function? Trade off: giving up a trait for another Eg, silent for survival or noisy for  more food Presuming the benefits of the  traits are greater than the given  up traits  Complex adaptation require explanation - Can’t explain how a complex organism (eg eye) come  in to existence by chance There must be a designer, ie god.  - But this explanation can’t explain maladaptive features  of organism  Source of design - Before 1895: special creation - 1895: evolution by natural selection Natural selection theory (first approximation)
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This note was uploaded on 05/04/2008 for the course ANT 1 taught by Professor M.towner during the Spring '07 term at UC Davis.

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Ant 1 April 8 2008 - Adaptation and natural selection...

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