ANTH 1001 Study Guide - Midterm Guide: Jean-Baptiste Lamarck, Outcrossing, Centriole
Document Summary
An organism has needs in order to survive. Needs are met by the modification of organs or the production of new organs. Continued ise of the organs would lead to an increase in their functional capacity; lack of use of the organ leads to their degeneration and loss. These cataclysms caused the extinction of animals in the affected areas. After cataclysm subsided, the area was repopulated with animals from neighboring areas. Reproductive potential of a species is great. Resources in the environment are in limited supply. Biological variation is normal within a species. Any hereditary variation that allows an organism a slight advangtage in the competition for resources will be perpetuated. Those organisms with the favorable traits will survive and produce offspring. Then over generations, there will be an increase in frequency of individuals with favorable traits. Gregor mendel (1822-1884: published his results of the experiment in 1866. 25% wrinkled (round x round) (wrinkled x wrinkled)
