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lecture 11 notes - BioG1780 Evolution and Biodiversity...

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BioG1780 Fall 2010 Evolution and Biodiversity Today’s lecturer: Warren Allmon Lectures 11: Sept 20, 2010 1 Deciphering Earth History: Geology and Chronology This is the first of four lectures on Macroevolution The first three lectures in this module focus on the fossil record and what this record tells us about the history of life on earth. The fourth lecture in this set deals with how developmental biology can inform our understanding of the origin of novel form and function. Readings for this lecture: Section 2.3 (pp. 60-65) of the text; also relevant sections of Ithaca is Gorges . I. Big Patterns: deciphering the history of life. A. Phylogenetic trees show the order of branching, inferred from character distributions B. Evidence of past life from the fossil record. C. character data (DNA, morphology) from which we reconstruct phylogenies and first appearances of taxa in through earth history are independent datasets, but the order of branching and order of first appearances of increasingly nested taxa are the same.
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