Chapter 25

Chapter 25 - Chapter 25 An Nguyen Tree of life-History of species or group of species called Phylogeny-Analytical approach to diversity and

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Chapter 25 An Nguyen Tree of life -History of species or group of species called Phylogeny -Analytical approach to diversity and relationships of organisms called systematic. -Comparison Using DNA and RNA= molecular systematic Fossil Record from sedimentary rocks within layers of stratum. Only limited to organisms that were abundant, with hard shells, skeletons, at the right time the right place. Ember, freeze, casts, imprints, buried bones. Similar ancestry, DNA sequences = homology Analogy, homoplasies = similar physical appearance but different DNA sequences, convergent evolution Closely related organisms usually have the many part of the DNA sequences the same if take into consideration of deletion and insertion. Taxonomy More accurate naming system, binomial consists of genus and specific epithet. Panthera pardus Italicized, capital genus, all other classification only capital. D K P C O F G S Evolution relationships by branching diagrams called phylogenetic trees. Cladogram is a diagram showing patterns of shared characteristics.
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This note was uploaded on 04/12/2008 for the course SCIE 101 taught by Professor Nader during the Spring '08 term at Clemson.

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Chapter 25 - Chapter 25 An Nguyen Tree of life-History of species or group of species called Phylogeny-Analytical approach to diversity and

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