BIOL 1202 Chapter : Ch 22 Notes
Document Summary
Evolution: 2 main ideas: change over time of the genetic composition of a population, measured in generations, descent of modern organisms with modifications from preexisting organisms. Evolutionary adaptation: accumulation of inherited characteristics that enhance organisms" ability to survive in specific environments. Evolution by natural selection: darwin and wallace developed the theory independently, darwin- took a 5 year voyage on the beagle, wallace- naturalist in indonesia. Natural selection: the unequal survival and reproduction of organisms to environmental forces, resulting in the preservation of favorable adaptations, process selects from what is available in the gene pool, new characteristics are not created on demand. Artificial selection: selective breeding of organisms to encourage the occurrence of desirable traits, analogous to natural selections. Concept 22. 3 evaluation is supported by an overwhelming amount of scientific evidence: ex. Homologous: structure or other attributes in different species that resemble each other because of common ancestry.
