BIOL 1202 Chapter : Chapter 26 Phylogeny And The Tree Of Life

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15 Mar 2019
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Chapter 26: phylogeny and the tree of life. Systematics: the evolutionary history of a species or group of related species. An analytical approach to understanding the diversity and relationships or organisms. Taxonomy: the ordered division of organisms into categories based on a set of characteristics used to assess similarities and differences. The two part format of the scientific name of an organism. These are always written in a different font (e. g. italics) Genus is always capitalized; species is always lowercase. Linnaeus also introduced the system for grouping species in increasingly broad categories. Dear kevin please come over for gay sex. Systematics depict evolutionary relationships in branching phylogeneitc trees. Each branch point (node) represents the divergence of two species. Deeper branch points represent greater amounts of divergence. Interior nodes represent common ancestors, taxa at tips represent living species/groups. Rotating around any node leaves a phylogeny unchanged. Concept 26. 2: phylogenies are inferred from morphological and molecular data.

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