Anthropology 2 - Anthro 1Z03 Evolution and Mechanisms of...

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Anthro 1Z03: Evolution and Mechanisms of Inheritance Theory of evolution: biological descent with modification from a common ancestor through time Fossils: physical remains of once-living organisms; bones or teeth that are mineralized Species: related organisms that can interbreed viable offspring Adaptations: physical characteristics of specie that enhances its ability to survive and reproduce Natural selection: adaptations inc. in frequency from generation to generation b/c members w/ these  adaptations produce more offspring that survive to reproductive age than members w/o these  adaptations Adaptive radiation: out of one specie branch closely related multiple species; ancestors   different  environmental niches   new forms of species Non-genetic developmental change: biological change within an individual’s lifetime   can give  adaptive advantage/disadvantage to an individual or individual’s within a pop. Genes control developmental processes   developmental processes influence genes Where did it all begin? o Geological time: universe originated about 15 bya (THE BIG BANG) o Sun and Earth formed from gases about 4.5 bya o During cooling (earth forming), continents and oceans were formed
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This note was uploaded on 12/05/2011 for the course ANTHRO 1Z03 taught by Professor Poinar during the Spring '10 term at McMaster University.

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Anthropology 2 - Anthro 1Z03 Evolution and Mechanisms of...

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