02classification

02classification - A n n o u n c e m e n ts Today and...

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1 Announcements Today and Monday s reading (mostly on reserve) Optional: Ridley pp. 355-373 Anderson: pages on lecture topic handout •pp. 289-299 only for the big picture! Text: pp 178-183, 202-213 Next week s reading Text: pp. 21-41, 41-48 Classification Determination of species Usually simple Sometimes difficult for close relatives, especially in insects Relationships among species How are individual species related? How are groups of species related? Results in a hierarchical, nested system Figure 25.6 Hierarchical classification Figure 1.13 A small sample of biological diversity
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2 Methods of classification Phenetic based on overall similarity Often reflects evolutionary history, but ignores convergent evolution Phylogenetic Based on derived homology- synapomorphy Excludes characters that evolved convergently Identifies monophyletic groups Figure 1.17b Diversification of finches on the Galápagos Islands
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This note was uploaded on 03/02/2012 for the course BIOLOGY 323 taught by Professor Rank during the Spring '08 term at Sonoma.

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02classification - A n n o u n c e m e n ts Today and...

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