Evolution by Monroe W. Strickberger

Jones & Bartlett Publishers

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	Chapter 11 - Systematics and Classification The system of binomial nomenclature (taxonomy) which Linnaeus introduced is a convenient (and essential) means of classifying organisms. To a large extent, however, taxonomy is based upon appearance of organisms. The appearance of organisms may not necessarily reveal that species' true evolutionary relationships. Cladistics is an attempt to use classifications but in ways that reflect evolutionary relationships. Study the basis of cladistics by pursuing links in this web site. How does a cladistic analysis differ from the analysis provided by a dichotomous key? Visit the Journey into Phylogenetic Systematics web site. (The site will open externally in a new window) Review evidence for the appearance of new species. Visit the talk.origins archive. Observed Instances of Speciation web site. (The site will open externally in a new window) Systematic approaches provide a means of labelling and associating taxa but sometimes that process does not reveal evolutionary relationships. Phylogenetic systematics, using the approach of cladistics, seeks to associate taxa within evolutionary contexts. Visit the Journey into Phylogenetic Systematics web site. (The site will open externally in a new window)