Which of the following is true of a population that is evolving by means of natural selection

Evolution is the change in a population through genetic variation over time. Natural selection may be through (1) differential reproduction, that is, not all organisms are able to reproduce to their fullest capacity because nature cannot simply sustain it and (2) acquire genes, that is heredity.

1. B. Organisms best adapted to their environment have the highest fitness.

2. D. Aa & aa.

3. A. Populations within a species must be reproductively isolated.

4.A. An adaptation increases the fitness of the individual.

5. C. The point at which two groups shared a common ancestor.

6.D. All living things share a universal code.

7. A. The principle of common descent is the idea that all living & extinct organisms shared a common ancestor at some point in their evolutionary history.

8. D. The allele for white fur would probably increase as natural selection works on the population.

9. B. The bottleneck effect.

10.C. Adaptive radiation & convergent evolution.

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