PSY1 7 - Evolution and Behavior Sir Charles Darwin...

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Unformatted text preview: Evolution and Behavior Sir Charles Darwin 1809-1882 Info About Darwin 'DUZLQ¶V 0DLQ &RQWULEXWLRQV WR 3V\FKRORJ\ z Continuity of life forms z Mental evolution z Sexology Voyage Aboard H. M. S. Beagle 1831-1836 ,QIR $ERXW 'DUZLQ¶V The Voyage of the Beagle (1845) Thomas Malthus 1766-1834 Essay on the Principle Of Population (1798) Info About Malthus 0DOWKXV¶V 7KHRU\ RI 3RSXODWLRQ Creatures Food Charles Lyell 1797-1875 Principles Of Geology (1830) Info About Lyell $GDSWLYH 5DGLDWLRQ¡ 'DUZLQ¶V )LQFKHV Premises of Natural Selection z Because resources are limited, organisms must necessarily battle for survival. z Those organisms that possess favorable characteristics in that environment will reproduce PRUH¡ L¢H¢£ WKH\ DUH ³ILWWHU¢´ z Because of this differential reproduction, characteristics that are favorable in that environment will proliferate, whereas those that are unfavorable will decrease. z Reliable trends in natural selection constitute evolution by natural selection . Natural Selection The differential reproductive success of individuals within a population because of hereditary differences among them. The Inspiration for Natural Selection: Artificial Selection by Humans Evolution by Natural Selection Assumes: z Differences among organisms ( variability of traits ); traits can be structures or behavior. z Selection pressure(s) z A mechanism of inheritance ± Lamarckism (use-inheritance) for Darwin ± Genetics after Darwin Evolution by Natural Selection: z Is random and contains no internal momentum.Is random and contains no internal momentum....
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This note was uploaded on 01/25/2011 for the course PSYCH 41855 taught by Professor Fridlund during the Winter '10 term at UCSB.

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PSY1 7 - Evolution and Behavior Sir Charles Darwin...

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