3 - BIO 94 NOTES (1/9/09) Evolutionary process 1: alleles,...

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BIO 94 NOTES (1/9/09) Evolutionary process 1: alleles, causes of evolution Who was Darwin and how did he develop into a person who had a huge impact on human thought? o Avid naturalist, but indifferent student o Voyage of the Beagle o Facts on gathered during the voyage of the Beagle strongly implied that transmutation of species Key intellectual influences in developing theory of Evolution by Natural Selection o Lyell – uniformitarism in geology Earth is older than it looked (looked at fossils and saw that changes occurred in everyday processes [storms, earthquakes, etc] and that the rate of change is gradual o Malthus Wrote a paper on population which had a great influence on many people. “…struggle for existence…favorable variations would tend to be preserved, and unfavorable ones to be destroyed. The result of this would be the formation of new species.” Five components of Darwin’s Theory of Evolution o Steady change – world is steadity chaning – wasn’t widely accepted before Darwin o Gradualism – change takes place gradually – earth was a billion years old o Common descent – common anscestor and species are descendents of ancestors o Natural selection – reproduction of organisms that are better adapted to their
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This note was uploaded on 11/16/2009 for the course BIOL BIOL taught by Professor Johnson during the Spring '08 term at Aberystwyth University.

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3 - BIO 94 NOTES (1/9/09) Evolutionary process 1: alleles,...

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