Chapter 26

Chapter 26 - 19:09 Chapter26:PhylogenyandtheTreeofLife

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19:09 Chapter 26: Phylogeny and the Tree of Life Phylogeny: the evolutionary history of a species or group of related species Systematics: an analytical approach to understanding the diversity and  relationships of organisms Concept 26.1: Phylogenies show evolutionary relationships Taxonomy: the ordered division of organisms into categories based on a set of  characteristics used to assess similarities and differences Binomial Nomenclature o The two part format of the scientific name of an organism o The binomial name consists of Genus and species These are always written in a different font )e.g., italics) Genus is always capitalized; species is always lowercase E.g., Homo sapiens Carolus Linnaeus Hierarchical Classification o Linnaeus also introduced the system for grouping species in increasingly  broad categories o Keep Pipes Clean OF FaS Domain – Kingdom – Phylum – Class – Order – Family – Genus – 
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This note was uploaded on 02/22/2010 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

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Chapter 26 - 19:09 Chapter26:PhylogenyandtheTreeofLife

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