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C. Sample Multiple Choice Questions
C. Sample Multiple Choice Questions

... 2. Which of the following principles is NOT part of Darwin’s Theory of Evolution by natural selection? a. Evolution is a gradual process that occurs over long periods of time. b. Variation occurs among individuals in a population. c. Mutations are the ultimate source of genetic variation d. More ind ...
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... 2. Over time a small stream widens into a river, separating one group of antelopes into two. After this geographic isolation, now mutations that occur in one group do not affect the other group. Eventually the two groups may become so different that they can no longer mate. This is called: ...
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Evolution and Natural Selection
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Adaptation

In biology, an adaptation, also called an adaptive trait, is a trait with a current functional role in the life history of an organism that is maintained and evolved by means of natural selection. Adaptation refers to both the current state of being adapted and to the dynamic evolutionary process that leads to the adaptation. Adaptations enhance the fitness and survival of individuals. Organisms face a succession of environmental challenges as they grow and develop and are equipped with an adaptive plasticity as the phenotype of traits develop in response to the imposed conditions. The developmental norm of reaction for any given trait is essential to the correction of adaptation as it affords a kind of biological insurance or resilience to varying environments.
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