BIOL 1202 Study Guide - Midterm Guide: Carl Linnaeus, Phylogenetic Tree, Gene Duplication
Document Summary
Chapter 26: phylogeny and the tree of life: phylogeny: the evolutionary history of a species or group of related species, systematics: an analytical approach to understanding the diversity and relationships of organisms. Concept 26. 1: phylogenies show evolutionary relationships: taxonomy: the ordered division of organisms into categories based on a set of characteristics used to assess similarities and differences. Hierarchical classification: linnaeus also introduced the system for grouping species in increasingly broad categories, domain keep pipes clean of gas, figure 26. 3. Linking classification & phylogeny: systematists depict evolutionary relationships in branching phylogenetic trees, each branch point (node) represents the divergence of two species, deeper branch points represent greater amounts of divergence, lines represent lineages, figure 26. 4, picture kristi took. 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. Concept 26. 3: shared characters are used to construct phylogenetic trees.
