Topic11-BiologicalEvolution

Biology: A Guide to the Natural World with mybiology" (4th Edition)

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KroghF09.013 Biological Evolution Feb. 25, 2011 Topic 11: Biological Evolution Chapters 16, 17 and 18 I. Core Principles of Evolution A. Evolution is “Descent with Modification” All life descended from ancient common ancestor Genetic mutation is source of modificaiton B. Natural Selection causes most biological evolution Requires (genetic) phenotypic variation within population Strongest when reproduction and competition is high Best adapted individuals reproduce Alleles for adaptations increase in next generation II. Life and Times of Charles Darwin (1809-1882) Fig 16.1 A. Revolution in physical and Earth sciences in previous two centuries B. Global exploration and rise of biogeography Uneven distribution of biodiversity C. Lyell (1830) Uniformitarianism and Earth’s great age D. Early evolutionists Lamarck (paleontologist) progressive evolution by acquired characteristics E. Darwin travels around the world 1831-1836 (Fig. 16.3) Darwin Finches and adaptive radiation (fig. 16.7) F. 1859 “On the Origin of Species by Means of Natural Selection”
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Topic11-BiologicalEvolution - KroghF09.013 Biological...

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