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Unformatted text preview: 6/30/08 Ch. 22 Descent with modification: A Darwinian view on life A. What is evolution and adaptation? a. Two main ideas i. Change over time of the genetic composition of a population 1. Results in change in phenotype and genotype ii. Descent of modern organisms with modification from pre-existing organisms b. Evolutionary adaptation i. Accumulation of inherited characteristics that enhance an organism’s ability to survive in specific environments B. Evolution in a historical context a. Figure 22.2 (pg. 439) C. Catastrophism, Gradualism and Uniformitarianism a. Cuvier – catastrophism i. Catastrophes caused extinct species and strata (sediments of rock) ii. Where were fossils of species that are around today? b. Hutton (gradualism- geological processes happen over a long time ex. erosion) and Lyell (unifomitarianism- processes are slow, but steady over time) i. Slow natural forces(wind, water, earthquakes, and volcanoes) caused stratification in rock ii. Observations of geological formations + rate processes occur = Earth at least...
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This note was uploaded on 07/21/2008 for the course BIOL 1202 taught by Professor Gregg during the Summer '08 term at LSU.
- Summer '08