BIOL 1202 Chapter : Chapter 22 25
Document Summary
Chapter 22- descent with modification 1/20/2012 3:51:00 am. Chapter 22- descent with modification: a darwinian view of life. Evolution: two main ideas: change over time of the genetic composition of a population, decent of modern organisms with modification from preexisting organisms. Evolutionary adaption: accumulation of inherited characteristics that enhance organisms" ability to survive in specific environments. Darwin and wallace developed the theory independently: darwin- voyage of the beagle, wallace- naturalist in indonesia. Natural selection: the unequal survival and reproduction of organisms due to environmental forces. Resulting in the preservation of favorable adaptations: process selects from what is available in the game pool, new characteristics are not created on demand, mechanism behind natural selection page 458. Artificial selection: selective breeding of organisms to encourage the occurrence of desirable traits, analogous to natural selection, fig 22. Evolution is supported by an overwhelming amount of scientific evidence.
