PSYA01H3 Chapter 3: Chapter 3 study guide

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19 Apr 2011
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Biological evolution: changes that take place in the genetic and physical characteristics of a population or group of organisms over time. Darwin"s theory is used to help understand behaviour. Voyage of the beagle: darwin was on a boat, spent time collecting creatures and objects of every sort. Origin of species: he reviewed the work of earlier naturalists, became interested in artificial selection. Particular animals are deliberately mated to produce offspring that possess a specially desirable characteristic: became interested in natural selection. the fact that organisms reproduce differentially: within any given population, some members of a given species will produce more offspring than will others. Natural selection: natural selection is based on two premises: Individuals within a population show variability in heritable behavioural and physical characteristics. variation: differences among members of a species, including physical characteristics such as size, strength, or physiology, and behavioural characteristics such as intelligence or sociability.