BIOL 1F90 Lecture Notes - Lecture 21: Tiktaalik, Hedera Helix, Aquatic Animal
1 Mar 2018
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Document Summary
Analogous: showing similarity of function but different origins. Factors that led darwin to his theory of evolution by natural selection. Can get evolutionary change without natural selection. Five different types of evidence for evolutionary change. Group of related organisms that share a distinctive form. Among species that reproduce sexually, members of the same species are capable of interbreeding to produce viable and fertile offspring. A group of organisms belong to the same biological species if they are (actually or potentially) capable of interbreeding to produce 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 single gene in a population over time. Viewed on a larger scale relating to formation of new species or groups of species. Mid- to late-1600s, john ray was the first to carry out a thorough study of the natural world.
