Chapter 4-83-94

Chapter 4-83-94 - Boyd & Silk Chapter 4: Speciation and...

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1 Microevolution – how populations change under the influence of natural selection and other evolutionary forces Macroevolution –how species and higher taxa are created To properly comprehend the fossil record and history of the human lineage, we need to understand how new species and higher groupings are created and transformed over time. Species = distinguished based on behavior and morphology Biological Species Concept Defines species as a group of interbreeding organisms that are reproductively isolated from other organisms. Reproduction isolation – when members of a given group of organisms do not mate successfully with organisms outside of the group. o E . G. Gorilla will not mate with any other kind of animal. o Reproductive isolation prevents species from genetically blending E.G. No chorillas or gimps in nature because chimpanzees and gorillas are reproductively isolated. Ecological Species Concept
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This note was uploaded on 09/09/2009 for the course ANTH 123 taught by Professor Johnson during the Spring '08 term at UNC.

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Chapter 4-83-94 - Boyd & Silk Chapter 4: Speciation and...

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