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Unformatted text preview: PSYC 327 01.25.07 A) Generally, behavior is functional B) Nonfunctional / Dysfunctional 1) Environmental Changes across generations: organisms adapt to survive in changing ecological niches. a) in the past humans ate all available food to store when not available. Over time, this evolved to humans evolving to become storage machines. In present times, humans still continue to store food, but in a negative way (i.e., storing fat from candy). b) occurs across generations 2) Vicious circle behavior a) occurs within generations 3) Rate of natural selection tends to be slow 4) Genetically linked traits- pleiotropy a) ie- sickle cell anemia occurs when red blood cells are not disk shaped and cannot store as much oxygen as normal. This trait is recessive and is linked, being passed down from generation to generation. This same gene provides protection against malaria. 5) Hidden Benefits C) Proximate and Ultimate Explainations 1) Proximate - mechanism responsible for trait we see....
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- Spring '07