Biology 1001A Lecture Notes - Slime Mold, Multicellular Organism, Symmetry In Biology
9 Jul 2013
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7/9/2013 3:17:00 pm most recent common ancestor (mrca) for a given group(s), given a phylogenetic tree. Human shared mrca with chimps and bonobos gorillas (mrca fo all great afircan apes is this right?) orang utans (mrca of all great apes) Monotremes (mammals but lay eggs; mrca of all mammals) Reptiles (including birds b/c snakes and lizards have a mrca with birds i. e. than with turtles) Lungfish, coelacanths, ray-finned fish, sharks, jawless fish (mrca of all vertebrates) Bacteria (mrca with bas is luca) why the idea that humans are descended from chimps is inaccurate. Humans share a mrca with chimps; we are like their cousins! But we did not descend from them order of main branching events in tree of life (dates not testable). See lecture outcome 1 cause of global catastrophe associated with mass extinction 65 mya. Meteor which changed temperature and availability of light.
