Lecture 3 - Principles of Geology. 18311836 Darwin travels...

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BIO 311D LECTURE 3 Darwin and evolution
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Evolution Descent with modification Darwin’s mechanism –
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Process of evolution – 4 steps 1.There is genetically-based variation in the population, due initially to random mutation. 1.In a given environment, individuals with certain genetic-based traits have greater reproductive success than other individuals. 1.Those individuals pass more copies of their alleles into the next generation. 1.As a result, there is a change in allele frequency over time.
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Linnaeus (classification) Hutton (gradual geologic change) Lamarck (species can change) Malthus (population limits) Cuvier (fossils, extinction) Lyell (modern geology) Darwin (evolution, nutural selection) Mendel (inheritance) Wallace (evolution, natural selection) 1750 American Revolution French Revolution U.S. Civil War 1800 1850 1900 1795 Hutton proposes his theory of gradualism. 1798 Malthus publishes “Essay on the Principle of Population.” 1809 Lamarck publishes his theory of evolution. 1830 Lyell publishes
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Unformatted text preview: Principles of Geology. 18311836 Darwin travels around the world on HMS Beagle. Darwin begins his notebooks on the origin of species. 1837 Darwin writes his essay on the origin of species. 1844 Wallace sends his theory to Darwin. 1858 The Origin of Species is published. 1859 Mendel publishes inheritance papers. 1865 Charles Darwin 1809-1882 Darwin On the Origin of Species by Means of Natural Selection , 1859. diversity Adaptation Descent with modification Darwins observations of nature: Observation #1 : Observation #2 : Observation #3 : Observation #4 : Inference #1 : Inference #2 : Evidence for evolution Observation of evolutionary changes fossil record Biogeography Homologous structures Vestigial structures Molecular homologies Criticisms of evolution Adaptation Adaptations can be AMAZING! Constraints on adaptations Adaptive peaks and valleys Our keyboard the QWERTY keyboard Further thoughts...
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Lecture 3 - Principles of Geology. 18311836 Darwin travels...

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