BIOLOGY 1M03 Study Guide - Midterm Guide: Hand Axe, Postcrania, Pleistocene
25 Mar 2017
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Proximate & ultimate causation proximate causation: how a behaviour is initiated and expressed ultimate causation: why a behaviour exists as an evolutionary adaptation. Fixed action pattern, fap a highly stereotyped, innate behaviour that is conducted to completion by a sensory cue. Releaser: sign stimulus, from one individual to another. Can be costly/dangerions kinesis: undirected, random motion towards a stimulus taxis: speci c, directed motion in response to an external stimulus agnostic behaviour: threatening behaviour, involves a contest. Determines who gets access to food or mates. Altruism a behaviour that reduces an individual"s personal welfare ( tness) but bene ts the recipient"s. Tness individual/direct tness (through descendant kin) + indirect tness = inclusive tness. Intrasexual males compete for mates males are not choosy males invest in mating. Intersexual females are choosy regarding mating females invest more in o spring e. g peacocks. Sex role reversal males care for o spring, males are choosy, females compete for mates.
