Biology 1202B Lecture Notes - Lecture 1: Frederick Griffith, Dna Replication, Population Genetics

• School: Western University
• Department: Biology
• Course: Biology 1202B
• Professor: Ian Mac Donald

Document Summary

Leclerc: body parts with no function (vestigial/useless structures) Cuvier: catastrophism= each fossil layer shows remains of animals that have died in catastrophe. Hutton: earth changed slowly (ex. erosion of land by water) U(cid:374)ifor(cid:373)itaria(cid:374)is(cid:373): (cid:272)o(cid:374)(cid:272)ept of geologi(cid:272)al pro(cid:272)esses s(cid:272)ulpted o(cid:374) earth"s surfa(cid:272)e o(cid:448)er lo(cid:374)g periods of time (ex. volcanoes) La(cid:373)ar(cid:272)k: (cid:862)perfe(cid:272)ti(cid:374)g pri(cid:374)(cid:272)iple(cid:863) (cid:894)a(cid:374)i(cid:373)als (cid:271)e(cid:272)o(cid:373)e (cid:271)etter suited to their e(cid:374)(cid:448)iro(cid:374)(cid:373)e(cid:374)ts fro(cid:373) si(cid:373)ple to complex) + body parts grow in fro(cid:373) proportio(cid:374) to ho(cid:449) (cid:373)u(cid:272)h the(cid:455)"re used + inheritance of acquired traits. Four important contributions to evolutionary worldview: all species change through time, changes are passed from 1 generation to the next, organisms change in response to their environments, hypothesized existence of specific mechanisms that caused evolutionary change. Natural selection: where characteristics that better enable organisms to adapt to certain environmental conditions increase in succeeding generations in a population= higher survival rate and greater reproduction rate. Evolutionary divergence: process where natural selection/genetic drift cause populations to become more different over time.