Chapter 23 - Chapter 23 Systematics and Phylogeny I....

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Chapter 23 Systematics and Phylogeny I. Classification of Organisms A. Taxonomy = science of classifying living things 1. No two organisms may have the same name 2. All names are in Latin – 3. Binomial Why not use common names? II. Phylogeny A. Taxonomic hierarchy 1.Kingdom 2.Phylum 3.Class 4.Order 5.Family 6.Genus 7.Species B. Systematics – study of evolutionary relationships 1. Looks at similarities and differences b/t species to construct an evolutionary tree(phylogeny) 2. hypothetical 3. Convergent evolution, analogous structures = problem
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C. Cladistics- a type of systematics that looks at shared derived characters 1.Derived characters = departure from the primitive form, not inherited from ancestor 2. Clade – members that share a derived character, descendents of a particular common ancestor 3. Synapomorphy – derived character shared by members of a clade 4. Outgroup – closely related but doesn’t share derived character of clade 5. Symplesiomorph – shared ancestral traits
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This note was uploaded on 05/10/2009 for the course BIOLOGY 21909 taught by Professor Jefffeaster during the Spring '09 term at Fullerton College.

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Chapter 23 - Chapter 23 Systematics and Phylogeny I....

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