3.08.06 L61

3.08.06 L61 - March 8 2006 Lecture 61 Evolution Key Events...

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March 8, 2006 Lecture 61: Evolution Key Events of the 19 th  Century  Hey Darwin! The Origin.  Evidence for Evolution Selective breeding Vestigial structures – structure that is no longer important for the survival of the  organism.  o The hind feet of whales o Reproduces as asexually, but has sexual organs homology: likeness due to shared ancestry o Cat, human, whale, bat Analogy – same function, not necessarily from the same area. o i.e sugar squirrels in Aussie and flying squirrels in NA. o Molecular homology ito genes. The Pieces as Darwin Observed Them Geology – long time scales Fossils – paleontology – organisms have changed over time. So organisms must have evolved, Lamarck suggested an idea, which was SHOT DOWN Populations grow exponentially (more babies born than survive (Malthus.) Organisms vary, variations are heritable
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This note was uploaded on 02/11/2008 for the course BIO G 101 taught by Professor Gilbert,c. during the Fall '07 term at Cornell.

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3.08.06 L61 - March 8 2006 Lecture 61 Evolution Key Events...

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