01:119:115 Lecture 1: Bio II - Keating (All lectures) copy (1)
13 Aug 2018
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Species: base unit, taxonomy - giving names, binomial nomenclature (linnaeus, 2 part name, genus & specific epithet, rules, latin, italics, genus. Classification: evolutionary relationships can be understood, species is basic unit of classification, phylogeny - history of species, systematics - process of classifying, hierarchal classification. Phylogenetic trees: branching diagrams, shows patterns of descent, not phenotypic similarities, hypothesis, dichotomies. Bio ii page 1: dichotomies, components, nodes - branch points. Divergence from common ancestor (ca: sister taxa. Groups of organisms that share a common ancestor (ca: rooted tree. Has 1 branch point that represents the most recent common ancestor of all taxa on tree: basal taxon. Diverged early in history of group: polytomy. Evolution: accumulation of genetic change over time, natural selection. Acts on individuals but population is what evolves. Tree of life: 3 domains, bacteria (prokaryotes) Bio ii page 2: bacteria (prokaryotes, archaea (prokaryotes, eukarya.
