BIOL1105 Lecture Notes - Lecture 25: Great Chain Of Being, Jean-Baptiste Lamarck, Robert Fitzroy
Document Summary
In 1859, charles darwin published on the origin of species by means of natural selection. Darwin made two points in the origins of species. Today"s orga(cid:374)is(cid:373)s des(cid:272)e(cid:374)ded fro(cid:373) a(cid:374)(cid:272)estral spe(cid:272)ies (cid:894)i. e. e(cid:448)olutio(cid:374)(cid:895) Natural selection provided a mechanism for evolutionary change in population. 1 western culture resisted evolutionary views of life. The origin of species challenged a worldview that has been accepted for centuries. The greek philosopher aristotle viewed species as fixed and arranged them on a scala naturae. The old testament account of creation fortified the idea that species were individually designed and did not evolve. Theory of gradualism: major changes result from slow, but continuous, processes (e. g. canyon) Mechanisms of change are constant over time. Dar(cid:449)i(cid:374)"s (cid:448)ie(cid:449)s (cid:449)ere i(cid:374)flue(cid:374)(cid:272)ed (cid:271)y fossils, impressions of organisms usually mineralized in sedimentary rocks. Sedimentary rocks form when mud and sand settle to the bottom of seas, lakes, and marshes. New layers of sediment cover older ones, creating layers of rock called strata.
