PSYC 4039 : FORCES FINAL EXAM
Document Summary
Principle of fixity of species: species were immortals/unchangeable after their creation. Theory of catastrophism: in the past, there were a series of sudden and violent geological and eliminate changes that periodically led to extinctions of species in the affected regions. After the catalysmis event subsided, the area was repopulated by migration of similar looking, but identical species from neighboring areas. Theory of uniformitarianism: forces acting today that shape the earth are the same forces that acted in the past. Theory of natural selection: observations on the golapagos islands. Alfred russell wallace (1823-1913: also proposed the idea of species change by natural selection. Those organisms with favorable traits will survive and produce more offspring. Overtime, there will be an increase in the frequency of the favorable traits. Gregor mendel (1822-1884: 1866 paper on study was published. F(2); round (75%), wrinkled (25%) (round x round) (wrinkled x wrinkled) F(3); round (100%), round (75%), wrinkled (25%), wrinkled (100%)
