BIO120H1 Study Guide - Midterm Guide: Richard Lewontin, Sexual Selection, Eichhornia Crassipes

• School: UTSG
• Department: Biology
• Course: BIO120H1
• Professor: James Thomson

Document Summary

Co-discovered the chief mechanism of evolution (i. e natural selection) with. After return from beagle 20 years taken up with accumulation of evidence for the theory of evolution. June 1858: received on the tendency of varieties to depart indefinitely from the original type from a. r. 1859: publication of the origin of species. Natural selection as the major agent operating on variations among a population. Made numerous observations and collected plants and animal fossils. Influenced by the botanist john s. henslow at cambridge. The idea that current landscape developed through erosion. The notion of a dynamic rather than a static world emerged in darwin"s thinking. There are 4 similar species endemic to the islands descended from a. Darwin started questioning the static nature or fixity of species and though some were younger or older version of others. Variations are not imperfections but rather the raw material from which natural selection fashions better adapted forms of life.