BIOL 1202 : Bio1202 Test 1 1
Document Summary
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 adaptation: accumulation of inherited characteristics that enhance organisms" ability to survive in specific environments (natural selection) Bodies of living organisms are modified through the use of disuse of parts. This idea turned out to be wrong! -- think about the 100-m dash track and field competition. Artificial selection: selective breeding of organisms to encourage the occurrence of desirable traits, analogous to natural selection. Evolution is supported by an overwhelming amount of scientific evidence. Fossil record: show change in organisms through time, change in types of organisms. Fossil record: fossil record not only provides evidence of small-scale changes but of origin of major groups, for example, the cetaceans. Homologous: structures or other attributes in different species that resemble each other because of common ancestry.
