BIO152H5 Lecture Notes - Lecture 7: Plate Tectonics, Carl Linnaeus, Sugar Glider
Document Summary
Origins of evolutionary thought: naturalist & geologists. If (cid:455)ou a(cid:272)(cid:395)ui(cid:396)e so(cid:373)ethi(cid:374)g o(cid:448)e(cid:396) lifeti(cid:373)e, if it"s (cid:374)ot (cid:396)elated to ge(cid:374)eti(cid:272)s (cid:455)ou (cid:272)a(cid:374)(cid:374)ot pass them on (shows discrepancies in lamark theory about giraffes) Disproves lamarks theory: variation may be acquired in a lifetime but it cannot be inherited. Charles darwin: developed his ideas of evolutions through his travels started as a naturalist: observed that darwin, although all the finches shared a common ancestor, their beak sizes had evolved to suit their food. This is termed as decent with modification. There are many different species due to adaption to their environment. Decent with modification living organisms change gradually from one form into another over time. Natural selection individuals have certain heritable traits that help them survive and reproduce. The origin of species-two important ideas: 1. All organisms have descended with modification from a common ancestor: 2. The major agent of modification is natural selection.
