01:119:115 Lecture Notes - Lecture 1: Carl Linnaeus, Phylogenetics, Optimal Foraging Theory
18 Dec 2015
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Document Summary
A-study of diversity of organisms and evolutionary relationships: two parts. 5. genus name is unique, can be used alone. 6. species name is not unique, cannot be used alone. _11,000 names still in use, due to linnaeus. Each group in one and only one higher group at each level. Box in a box thinking together based on a particular characteristic. Inclusiveness- each level more inclusive then the one below evolutionary relationships. A-branching diagrams them represent evolutionsary history of a groups of organisms. May or may not be an accurate reflection of evolutionary history. Rooted tree-have one branch that represents the most recent common ancestor. Basal taxon: lineage that diverges early in the history of the group (out groups) Polytomy: branch point with more then two groups, indicated unclear evolutionary. Extant species-species currently living, tips of branches relationships. Pattern of dessent and relatedness, not phenotypically similarity. Often does not indicate timeframe or amount of change.
