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NCSU BIO 181 - Evolution/Evidence

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BIO 181 1st Edition Lecture 5Outline of Past LectureI. Hierarchy of OrganizationII. Seven Characteristics of LifeIII. Nature of ScienceIV. Scientific MethodV. Deductive and inductive reasoningVI. TheoryVII. Is it Really Science?VII. The move to EvolutionIX. Evolution Intro/EvidenceX. Evidence for EvolutionOutline of Current LectureI. Evidence of Evolution 2II. MutationsCurrent LectureI. Evidence of Evolution 25. Biochemical Evidence -Darwin knew nothing about thisa. Foxp2 gene: critical for developmentb. ex: speech in humansc. ex: rapid movement of lips and tongued. not about special genes that makes us humane. humans share many genes with other living organismf. the way we use and turn off genes influences if we are humans6. Embryology a. embryos of different vertebrates often similar at young age b. pharyngeal pouches, develop into structures c. become glands and ducts d. in fish turn into gill slits e. vestigial gill slitsi. ex: they can appear in some people f. vestigial tail bonesi. traits of tail not usually expressed in humansii. But have a long tail when embryosiii. as adults becomes coccyx at end of our spine 7. Distribution of Species (biogeography)i. every species does not live in its typical habitatii. there are not rabbits in every habitat they can thrive iniii. some gain other different qualities, due to these new habitatII. MutationsA. less line of mutation, a. more closely related b. human and monkey closely related than duck and chickenB. convergent evolutiona. occurs in species exposed to similar conditionsi. webbed feet in ducks and ottersC. sympatric speciationa. “differentiation of population within a common geographic area into species”b. ex: A plant species within a location that has both wet and dry soils isD. allopatric speciationa. separated by a geographic structure forms distinct species b. ex: rabbits species with members separated by a mountain


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