BIO152H5 Lecture Notes - Lecture 16: Genetic Variation, Natural Selection, Fixed Action Pattern
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Broad definition: decisions made by organisms, _____________ is essential to survival and reproduction, thus it is subject to natural selection. Proximate causation: what and how questions: what stimulus elicits the behavior and what physiological mechanisms mediate the response, how focuses on the mechanism of the behavior. Ultimate causation: why question: why has the animal evolved the behavior or why does the behavior occur in the context of natural selection, we can also look at how the behavior helps the organism to survive and reproduce. Fixed action pattern (fap) is a highly stereotypical innate behavior pattern where a sequence of unlearned acts is linked to a simple stimulus. Has three characteristics: there is almost no__________in how behaviors are performed, behaviors are species ____________, once the sequence of actions begins, it _________ until completion. Aggressive territorial response in sticklebacks is an example of a fixed action pattern. The trigger for the behavior is a sign stimulus, in this example, the.
