Biology 1001A Study Guide - Midterm Guide: Gene Pool, Meristem, Melanosome
21 Nov 2016
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Document Summary
Principles underlying evolution by natural selection: origin of variation, heritability, differential reproduction, change in genotype of the population over time. Because the virus eventually evolves to become resisted to azt and it not longer gets. Mutations variation in azt-resistance: random mistakes but the ones that allow the viruses to survive pass on this mutation (it is naturally selected) Not all virions reproduce (struggle for existence) When azt is present, some forms (azt- resistant) are more likely to reproduce than others (azt-susceptible: this is due a reproductive advantage created by integration of azt into the environment. Evidence from the fossil record, historical biogeography, comparative morphology and molecular biology that support the idea of descent with modification from a common ancestor. Fossil record: there are biological lineages, which are evolutionary sequences of ancestral organisms and their descendant, evolution of modern species can be traced through fossils of their ancestors. Monkeys in africa and asia have evolved to be different.
