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COB Chapter 15

QuestionAnswer
mechanisms of evolution that says changes in species arise because the best adapted organisms produce more well adapted offspring natural selection
changes in a species that occur over time evolution
anatomically similar structures inherited from a common ancestor. Ex. the bones in a bird wing, human arm and a whale flipper homologous structure
non-functioning structure that isthe reduced form of a functional structure in an ancestor. Ex. wisdom teeth in humans vestigial structure
a trait shaped by natural selection that increases an organism's reproductive success adaptation
principle that states if allelic frequencies remain constant for a population (genetic equilibrium), the population will not evolve. Hardy-Weinberg Principle
any random change in a population's allelic frequency. Has more effect on a small, closed population genetic drift
pattern of evolution in which one species diverges into two which each diverge into two etc. adaptive radiation
theory dealing with the rate of speciation that says evolution is constantly occurring at a slow steady rate gradualism
theory dealing with the rate of speciation which says rapid spurts of genetic change are followed by long periods of genetic equilibrium punctuated equilibrium
Created by: abolvin
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