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6 Cards in this Set

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adaptive landscape
a graph of the average fitness of a population in relation to the frequencies of genotypes in it. Peaks on the landscape correspond to genotypic frequencies at which the average fitness is high, valleys to genotypic frecuencies at which the average fitness is low.
adaptive logic
tends to increase the number of offspring that an individual contributes to the next and following generations. If such a behavior is even partly genetically determined, it will tend to become widespread in the population. Then, even if circumstances change such that it no longer provides any survival or reproductive advantage, the behavior will still tend to be exhibited-- unless it becomes positively disadvantageous in the new environment .
adaptive radiation
the diversification, over evolutionary time, of a species or group of species into several different species or subspecies that are typically adapted to different ecological niches.
adaptive strategies
a mode of coping with competition or environmental conditions on an evolutionary time scale. Species adapt when succeeding generations emphasize beneficial characteristics.
adaptation
any heritable characteristic of an organism that improves its ability to survive and reproduce in its environment. Also, used to describe the process of genetic change within a population, as influenced by natural selection.
acquired trait
a phenotypic characteristic, acquired during growth and development, that is not genetically based and therefore cannot be passed on to the next generation