01:119:115 Lecture Notes - Lecture 22: Ingroups And Outgroups, Polyphyly, Common Descent

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rubyturtle895

30 Dec 2016

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Lecture 22 - phylogenetics: systematics: diversity & relationships, hierarchical classification. Scientific study of diversity of organisms & evolutionary relationships. Taxonomy - science of describing, naming, and classifying organisms. Phylogeny - evolutionary history of a species or group of related species. Each species assigned unique 2 part name binomial. Consists of genus to which it belongs + specific epithet. Domain species (dkpcofgs) did king phillip cry out for goodness sake: domain, kingdom, phylum, class, order, family, genus, species. Fig 26. 3 (species is on top - makes a pyramid) = general name for grouping of organisms at any one of these levels. Each taxonomic level is more inclusive than the one below it . Family: felidae - short face, highly modified teeth. Class: mammalia - have fur + produce milk. Linnaean classification & phylogeny can differ from each other. Phylogeny - only recognizes groups with common ancestor and all its descendants.

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