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 Natural & Artificial Selection 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.)
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