6-30-08 - Ch 22 Descent with modification A Darwinian view...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

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...
View Full Document

This note was uploaded on 07/21/2008 for the course BIOL 1202 taught by Professor Gregg during the Summer '08 term at LSU.

Page1 / 3

6-30-08 - Ch 22 Descent with modification A Darwinian view...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online