BIOLOGY 1M03 Lecture Notes - Lecture 1: Genetic Correlation, Wisdom Tooth, Morning Sickness
11 Aug 2018
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Key concepts: evidence of evolution (changes through time, extinction, vestigial traits, inter-relatedness, evidence of natural selection (industrial melanism, antibiotic resistance, beak size in galapagos finches, natural selection affects individuals, but evolution occurs in populations over time. Evidence for change through time: fossils: trilbite fossil from bc, canada ~505 years old, 3. 6 mill year old hominid footprint. Evidence for change through time: extinction: many fossils provide evidence for extinct species, those that are no longer living. Evidence for change through time: prehistoric turds and ancient dna. Goose bumps legacy when we had a lot of hair, to keep warm show emotion. Tail bone smaller and smaller, the tail bone is a legacy for when we evolved from species that had tails. Vestigial trait so(cid:373)ethi(cid:374)g prese(cid:374)t i(cid:374) a(cid:374)(cid:272)estor, (cid:374)atural sele(cid:272)tio(cid:374) has(cid:374)"t (cid:272)hose(cid:374) so less persiste(cid:374)t. Other examples include: hind limbs of a baleen whale.
