BIOL 1202 Chapter : Chapter 26
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. 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, keep pipes clean of gas (fig. 26. 3: classification, kingdom animalia, phylum cordata, class mammalia, order primates, family hominidae, genus homo, species h. sapiens. Shared ancestral and shared derived characteristics (fig 26. 11: shared ancestral characteristic: homologous structure that predates the branching of a particular clade from other members of that clade, shared derived characteristic: evolutionary novelty unique to a particular clade. An organisms evolutionary history is documented in its genome: gene duplications and gene families, gene duplication: the production of multiple copies of a gene within the genome.
