BIO120H1 Lecture Notes - Lecture 10: African Great Lakes, Willi Hennig, Carl Linnaeus
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BIO120H1 Full Course Notes
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Document Summary
How best to classify life - systematics, taxonomy, and cladistics: phylogenetic trees and the reconstruction of evolutionary history using molecular data, character evolution, the origin of adaptations and key innovations. Speciation via reproductive isolation allows organisms to diverge and diversify. Taxon a taxonomic unit at any level. Taxonomic units: k, p, c, o, f, g, s. Kingdom > phyla > class > order > family > genus > species. Name is a key to the literature on an organism > has predictive power. The study of biodiversity and the evolutionary relationships among organisms. Schools of taxonomy: philosophical wars of the 70"s and 80"s. Negates homoplasy and convergent evolution and ancestral traits. Classifying species on the basis of their phylogenetic relationships. The birth of cladistics and the building of phylogenetic trees: willi hennig. Phylogenetic trees provide a depiction of the evolutionary relationships among groups of organisms important to appreciate they are a hypothesis about evolutionary history.
