BIOL 1F90 Lecture 15: Chapter 21 - Intro to Evolution
2 Mar 2017
School
Department
Course
Professor
Document Summary
Analogous: showing similarity to function but different origins. Group of related organisms that share a distinctive form. Among species that reproduce sexually, member of the same species are capable of interbreeding to produce viable and fertile offspring. A heritable change in one or more characteristics of a population or species across many generations. Viewed on a small scale relating to changes in a singe gene in a population over time = micro- evolutionary. Viewed on a larger scale relating to formation of new species or groups of species = macro- evolutionary. Mid- to late- 1600s, john ray was the first to carry out a thorough study of the natural world: developed an early classification system, modern species concept. Extended to carolus linnaeus change - put his theory out despite criticism: why and how they do it. Late 1700s, small number of european scientists suggest life forms are not fixed. Neither proposed that evolutionary change promotes the formation of new species.
