01:119:115 Lecture Notes - Lecture 22: Binomial Nomenclature, Phylogenetic Tree, Phylogenetics

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copperseal575

1 Dec 2017

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I. systematics: diversity and relationships: hierarchical classification. Elements of the study of diversity & evolutionary relationships of organisms: Taxonomy : science of describing, naming, and classifying organisms. Phylogeny : evolutionary history of a species or group of related species. Genus unique and can be used alone can say genus . Domain, kingdom, phylum, class, order, family, genus, species. Only recognizes groups with common ancestor and all its descendants. I. basics of phylogenetics: intro to phylogenetics. Extant species : species currently alive, tips of branches. Branch point : divergence of 2 species from a common ancestor. Of all taxa on tree, ancestral lineage in diagram. Phylogeny : evolutionary history of a group of organisms from a common ancestor. Homology : how to read a phylogenetic tree. All members of groups share common ancestor. Distinctly related species, but doesn"t include their most . Clade : a group which includes ancestral species and all of its descendants.

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