Biology 1001A Lecture Notes - Lecture 3: Hominidae, Odd-Toed Ungulate, Archaea
27 May 2015
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Document Summary
18 thousand new species discovered in the last year (ex. We don"t know how many species we don"t know about : study predicts that there are 8. 7 million eukaryotes, give or take 1. 3 million, 1. 2 of which we have names for. Universal common descent and the origin of species. The revolutionary idea was not natural selection but common ancestry idea that we can trace evolutionary paths and find all life on earth connected. Similarities due to homology traits that diff. organisms share b/c they"re descendants of ca: evolutionary patterns due to relatedness (analogy cantebury tales book, deep homology: species related by a past common ancestor. Rendez vous zero: mrca of all humans. Study predicts we have to trace back 3000 thousand years of evolutionary history to find the most recent common ancestor of all present day humans. Mrca 5-6mya, we"re evolutionary cousins and evolved differently luca. Mrca the african great apes, 7-8mya (next closest relatives to us)
