BIOL 102 Lecture 8: Chapter 26 Part 1
20 Nov 2016
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Phylogeny= the evolutionary history of a species or group of related species: ex. A phylogeny shows that legless lizards and snakes evolved from diff lineages of legged lizards. Systematics= classifies organisms and determines their evolutionary relationships. Taxonomy= the scientific discipline concerned w classifying and naming organisms. Systematics= classifies organisms and determines their evolutionary relationship. In 18th century, carolus linnaeus published a system of taxonomy based on resemblances. 2 key features of his system remain useful today; 2-part names for species and hierarchical classification classification. Binomial= the 2-part scientific name of a species. Epithet= the second part of the name; unique for each species within a genus. The first letter of the genus is capitalized and the entire species name is italicized. Linnaeus introduced a system for grouping species in increasingly inclusive categories. Taxonomic groups from broad to narrow are domain, kingdom, phylum, class, order, family, genus, and species. Taxon= a taxonomic unit at any level of hierarchy.
