07_311d_feb._13_2008 - Bio 311D Feb. 13, 2008 What...

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Bio 311D Feb. 13, 2008 What observations led scientists to the notion of evolution? ● Natural Selection: an explanation for how evolution occurs ● Quantifying evolution: population genetics Morphological evidence Biochemical Evidence Fossil evidence Genetic evidence Evidence from Artificial Selection
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2 Incomplete Dominance Is the Blending Hypothesis correct after all??
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Fossils From the Burgess Shale Found Atop the Canadian Rockies 3
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4 Continental Drift Affected Migration Routes and Explains How Similar organisms living in disparate places can be so similar in form and appearance
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Australian Emu African Ostrich South American Rhea Convergent Evolution Flightless Birds with long muscular legs 5
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6 Three Grassland-Dwelling, Ant Eating Mammals From Different Parts of the World Aardvark: Africa Pangolin: Southeast Asia Giant Anteater: Mexico, S. America Convergent Evolution
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7 American Cactus South African Spurge
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8 Convergent Evolution of Placentals and Mammals
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9 Australian Sugar Glider (a marsupial) Superficial resemblance to North American Flying Squirrel Analogous Structures
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10 Homologous Structures Comparative Morphology:
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All Python Snakes have vestigial hind limbs 11
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Whales Have Vestigial Ankle Bones: A Hint of their Evolution from Tetrapods 12
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07_311d_feb._13_2008 - Bio 311D Feb. 13, 2008 What...

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