01:119:115 Lecture Notes - Lecture 8: Branch Point, Phylogenetic Tree, Carl Linnaeus
2 Feb 2016
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Document Summary
A study of diversity of organisms & evolutionary relationships. Binomial nomenclature: species: basic unit of classification, system for naming species, developed by linnaeus, each species assigned unique 2- part name (genus and species name, genus + species (specific epithet) Sapiens= species wise : rules, always latin or latinized, genus capitalized, species isn"t, italicized or underlined, genus can be abbreviated, genus is unique, can be used alone, species not always unique, cannot be used alone. 11,000 names still in use date to linnaeus. Each level more inclusive than one below- includes more species. Each group in one and only one higher group at each level. Taxonomists group organisms together based on particular characteristics. Phylogenetic trees: branching diagram, represents evolutionary history of group of organisms, phylogenies represent hypotheses. Subject to change based on new data: relationships represented as dichotomies 2- way branch points. May or may not be an accurate reflection of evolutionary history: components.
