Lec16 - Microevolution Thursday 10/27/11 Evidence of...

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Microevolution Thursday 10/27/11 Evidence of Evolution Microevolution change in allele frequencies over generations corresponding changes in phenotypes w/in population concept of genetic equilibrium mechanisms of microevolution genetic drift // gene flow // mutations natural selection review sources of genetic variation stabilizing, directional, & diversifying selection
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Evolution: change over time change in the change in fig 27.13
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Evidence of Evolution fossil record biogeography comparative anatomy comparative embryology molecular biology studies demonstrating evolution Grant’s work & the Darwin’s Finches
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Fossils Rivers bring sediment to the ocean. Sedimentary rocks containing fossils form on the ocean floor. 1 2 3 Over time, additional strata are added, containing fossils from each time period. As sea levels change and the seafloor is pushed upward, sedimentary rocks are exposed. Erosion by rivers reveals strata; deeper strata contain older fossils. Younger stratum with more recent fossils Older stratum with older fossils
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The fossil record testifies fits extinct - found in fossil record present day South American armadillo
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chronological changes transitional species examples:
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This note was uploaded on 01/18/2012 for the course L 100 taught by Professor Dr.susanhengeveld during the Fall '11 term at Indiana.

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Lec16 - Microevolution Thursday 10/27/11 Evidence of...

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