BIOL 102 Lecture Notes - Lecture 4: Population Genetics, Natural Selection, Genetic Drift
Document Summary
The voyage of the beagle, nonadaptive evolution and speciation. Charles lyell- (geologist) uniformitarianism: the earth is older than 6,000 years. Thomas malthus- struggle for existence: carrying capacity: j and s curve. Jean baptiste de lamarck- evolution by acquired characteristics: first evolution theory, giraffes get taller due to stretching in parents. Papers from wallace and darwin were jointly presented (with little impact) to the linnaean society in 1858. Dust collected from the masthead on the beagle. Some of the original samples were added to growth medium and cultivated viable organisms after over one hundreds of years in storage. So(cid:373)e highlights of charles dar(cid:449)i(cid:374)"s (cid:448)oyage o(cid:374) the hms beagle. Dar(cid:449)i(cid:374) (cid:448)isited brazil"s atla(cid:374)ti(cid:272) rai(cid:374)forest (cid:271)efore loggi(cid:374)g (cid:271)ega(cid:374), a(cid:374)d discovered the incredible diversity of its flora and fauna, which differed greatly fro(cid:373) great britai(cid:374)"s. In argentina he found fossils of extinct mammals and discovered that they were different from living species but often closely resembled from them.
