BIO120H1 Lecture Notes - Lecture 22: Carl Linnaeus, Phylogenetic Tree, Paraphyly
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BIO120H1 Full Course Notes
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Document Summary
Speciation via reproductive isolation allows organisms to diverge and diversify. Carolus linnaeus- father of taxonomy (kingdom, phyla, classes, orders, families, genera and species) Organisms are that evolutionary related to one another should be group together. Out-group- represents something that"s outside of family tree. We share common ancestor with fungi, land plants (eukarya tree) Chimpanzee/gorilla-paraphyletic group (don"t share evolutionary history contains some not all species derived from common ancestor) Reptiles (lizards, snakes) are paraphyletic group-> share different common ancestor (reptile is not true evolutionary classification) Look more similar to one another (share derived traits) Sequencing dna allows to reconstruct evolutionary history aside from the phenotype. -changes in nucleotide indicate how much time has elapsed. Key innovation burst of opportunity of speciation (need to reconstruct phylogenies)
