LOPE notes week 4
LOPE notes week 4 BSCI - 10002 - 002
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This 1 page Class Notes was uploaded by Katelyn Rinella on Sunday February 14, 2016. The Class Notes belongs to BSCI - 10002 - 002 at Kent State University taught by Walter R Hoeh (P) in Fall 2015. Since its upload, it has received 35 views. For similar materials see LIFE ON PLANET EARTH in Biological Sciences at Kent State University.
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Date Created: 02/14/16
LOPE Notes Week 4 Mechanisms of evolution Main causes of evolutionary changes: - Genetic drift- change in gene pool of a small population due to chance/ wants to be different - Gene flow- genetic exchange with another population/ opposite of genetic drift/ similar - Natural selection (most important: generates adaptation/ deterministic process= not due to chance) Mutation is important but it is really slow/ random Natural selection types - Directional selection- cause evolutionary change - Disruptive selection- takes a bell shape curve and creates two - Stabilizing selection- most common/ prevents evolution Chapter 14: how biological diversity evolves (Macroevolution) Macroevolution= evolutionary change over relatively long spans of time Anagenesis- change within a single species over time Cladogenesis- one species undergoes speciation which yields two species over time Speciation- process in which one species splits into 2 or more species Allopatric speciation- due to geographic isolation Sympatric speciation- without geographic isolation Paleontologist- study ancient life by fossil records Neonatologist- study living species Tetrapod= 4 limbs
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