BIO120H1 Lecture Notes - Lecture 21: Sexual Conflict, Cichlid, Willi Hennig
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BIO120H1 Full Course Notes
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Name is a key to the literature on an organism. Therefore has predictive power (you have an idea of what something looks like based on its class) Enables interpretation of origins and evolutionary history (the name is embedded in its classification. A named taxonomic unit at any level. The study of biodiversity and the evolutionary relationships among organisms. Schools of taxonomy: philosophicalwars of the 70s and 80s. Phenetics: classifying species based solely on overall resemblance, now largely dead. Cladistics: classifying species on the basis of their phylogenetic relationships. Invented by willi hennig: phylogenetic trees provide a depiction of the evolutionary relationships among groups of organisms important to appreciate they are an hypothesis about evolutionary history. The o(cid:374)ly figure i(cid:374) the (cid:862)origi(cid:374)(cid:863) (cid:449)as a tree (cid:862)the affi(cid:374)ities of all (cid:271)ei(cid:374)gs ha(cid:448)e so(cid:373)eti(cid:373)es (cid:271)ee(cid:374) represe(cid:374)ted as a great tree a(cid:374)d so (cid:271)y ge(cid:374)eratio(cid:374) i (cid:271)elie(cid:448)e it has (cid:271)ee(cid:374) (cid:449)ith the great tree of life(cid:863)
