ANTH 1001 Chapter : ANTH1001
Document Summary
These "needs" are met by the modification of existing organs or production of new organs: continued use of organs leads to an increase/enhancement in their functional capacity and complexity (disuse leads to an organ"s degeneration or loss) The changes in the organ that occur during one"s lifetime are inheritable and are passed to one"s offspring: georges cuvier (1769-1832, creationist, disagreed with lamarck (change in organism, theory of catastrophism. In the past, there were a series of cataclysmic events that led to the extinction of animals in the affected region. After the cataclysmic event subsided, animals in the neighboring areas migrated into the region. The immigrant animals were similar in appearance, but not identical, with those that went extinct: charles lyell (1797-1875, theory of uniformitarianism, forces acting today that shape the earth are the same forces that acted in the past. Those organisms with favorable traits will survive and produce more offspring.
