01:119:115 Lecture Notes - Lecture 22: Homo Sapiens, Carl Linnaeus, Species Ii

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:115
• Professor: A Keating

Document Summary

26. 1-26. 3: systematics, study of diversity of organisms and evolutionary relationships, two parts. Phylogeny: evolutionary history of species or groups: binomial nomenclature, species: basic unit of life, system for naming species. Each species assigned unique 2-part name (genus + species: genus + species (specific epithet) Example: homo sapiens -> homo= genus, sapiens= species: naming rules. Species name not unique, cannot be used alone: ~11,000 names still in use date back to linnaeus, hierarchial classification, also from linnaeus, species the basic unit of classification, above species, increasing broad categories -> hierarchy, levels of classification. Taxon: grouping of organisms at any level: inclusiveness. Each level more inclusive than one below it -> includes more species. Each group is in one or only one higher group at each level: nested hierarchy box in a box system ex: cats, fig. Branches can be rotated about nodes, does not change relationships.