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.

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.

radon is correct hope this