BIOL 1202 Study Guide - Midterm Guide: Bryophyte, Rhizobium, Archegonium
Document Summary
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. The two part format of the scientific name of an organism. These are always written in a different font (italics) Genus is always capitalized and species is always lowercase. Linnaeus also introduced the system for grouping species in increasingly broad categories. Systematics 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. Each nodes represents a speciation event at some point in time. An interior node also represents a common ancestor to all the species that come after it. Taxa at a terminal node represent living groups. Rotating around any node leaves a phylogeny unchanged.
