BIO120H1 Lecture Notes - Lecture 10: Phenetics, Aquilegia, Coevolution
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BIO120H1 Full Course Notes
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The father of taxonomy: came up with binomial nomenclature (genus species, created a hierarchical system of classification, kingdom, phylum, class, order, family, genus, species. What is the purpose of biological classification: name is the key to literature on an organism, predictive power, enables interpretation of origins and evolutionary history. Taxon: a named taxonomic unit at any level, plural: taxa, ex: kingdoms, phyla, classes, etc. The study of biodiversity and the evolutionary relationships among organisms: phylogenetic relationships. The birth of cladistics and the building of phylogenetic trees: phylogenetic trees provide a depiction of evolutionary relationships among groups of organisms. Important to appreciate they are a hypothesis about evolutionary history: not the truth! Internodes represent ancestors in any other taxon: non-monophyletic group: taxon whose members are derived from two or more ancestral forms not common to all members, monophyletic classifications are much preferred. Critical steps in the reconstruction of phylogenetic history:
