BIO120H1 Chapter Notes - Chapter 1-5: Plants And Animals, Common Descent, Natural Theology
36
BIO120H1 Full Course Notes
Verified Note
36 documents
Document Summary
I(cid:374)t(cid:396)odu(cid:272)ed to willia(cid:373) pale(cid:455)"s theo(cid:396)(cid:455: the pe(cid:396)fe(cid:272)t desig(cid:374) of pla(cid:374)ts a(cid:374)d a(cid:374)i(cid:373)als i(cid:373)plies a (cid:862)(cid:373)aste(cid:396) (cid:373)e(cid:272)ha(cid:374)i(cid:272)(cid:863) If evolution happened, species living in one area should be descendants of earlier species in same place. Insects & arthropods: land mammals, reptiles, amphibians, freshwater fish. Cannot colonize through long distance disposal: long distance dispersal of a species cannot be a frequent event. Therefore they should have a somewhat unbalanced biogeography. Island plants & animals adapt to environment isolated from species that live elsewhere. If a trait evolves we can predict: step-by-step scenario for evolution that shows increasing fitness, adaptation must evolve by increasing the reproductive output of its processor. Increases the fitness of the individual (not necessarily the group or species) Animal & plant breeding: breeding is evidence for natural selection, artificial selection: breeder decides which traits to pass on, natural selection: nature decides which traits are good, which are bad.
