BIOL 1202 : Bio Exam 2
Document Summary
Phylogeny and the tree of life chapter 26. Phylogeny: the evolutionary history of a species or group of related species. Systematics: an analytical approach to understanding the diversity and relationships of organisms. Taxonomy: the ordered division of organisms into categories based on a set of characteristics used to assess similarities and differences. Two part format of the scientific name of an organism. These are always written in a different font. Genus is capitalized; species is always lowercase e. g. , homo sapiens. Linnaeus also introduced the system for grouping species in increasing broad categories. 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. Concept 26. 2 phylogenies are inferred from morphological and molecular data. Phylogenetic history can be inferred from similarities in homologous structures and genes when compared among organisms. Generally: similar morphology and similar dna sequences= closely related species.
