BISC208- Midterm Exam Guide - Comprehensive Notes for the exam ( 15 pages long!)
12 Oct 2017
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Phylogenies: grouping of populations based on genetics: reflect patterns of evolution and ancestry, gen 1, gen 2, gen n. Early life (precambrian era): 4. 6 bya to 541 mya: divided into the hadean, archaean, and protozoic eons, all life was unicellular, creation of internal organelles, photosynthetic life (boosted oxygen levels, oxygen increase in atmosphere. Endosymbiotic theory: mitochondrial dna similar to prokaryote, similar size as pro, double membrane similar to pro. Multicellular life took very long to evolve: stable environments from ice ages, lag phase of exponential growth. Cambrian explosion: documented by 3 major fossil assemblages mainly from. Canada, china, and australia: triggered by higher oxygen levels, evolution of predation, new niches beget more new niches, new genes/new bodies, 500 mya, creation of most extant terrestrial species, punctuated evolution. Adaptations to life on land: gills to lungs, fins to legs. Geologic timing: precambrian era (hadean, archaean, and protozoic eons) phanerozoic.
