BIO120H1 Lecture Notes - Lecture 1: Ginkgo, Macroevolution, Microevolution
36
BIO120H1 Full Course Notes
Verified Note
36 documents
Document Summary
Biological evolution: living things gradually change from one form to another over time. Levels of biological organizations molecules > cells > organisms > populations > community >eco. Darwinism: theory proposed by charles darwin: life on earth evolved gradually from common ancestor and branched out over time into diverse species and the mechanism for most changes in natural selection. =theory of descent with modi cations through natural selection. Theory of evolution components: evolution (species changed over time, gradualism(takes many generations to produce change, speciation (lineages split and branch. result in biodiversity, common ancestry(all species descended from an ancestor, a, natural selection( mechanism) Rate varies with species (ex. gingko trees and horseshoe crabs barely changed, while human and whales rapid, microbes very fast) Sub elds of evolutionary biology: microevolution (evolution mechanisms) Process orientated and experimental: macroevolution (evolution history) Looks at evolutionary history and relationship of organisms (phylogeny) Organisms have inner drive (ex. saver toothed tiger) lamarck.
