Which of the following is an example of adaptation? A rabbit population in which all of the members change fur color from brown to white as the seasons change A butterfly population where each individual makes more of an enzyme for processing toxins as its exposure to toxic plants increases An eagle population where adult eagles develop a tolerance for invasive mites over five years A fish population in which the average skin brightness decreases over several generations in the presence of predators

The correct answer is "A fish population in which the average skin brightness decreases over several generations in the presence of predators"

Explanation:

In biology, an adaptation is defined as an evolutionary response at which a group of organism develop new traits or behaviors as result of new environmental conditions. In this case, a fish population which skin brightness decreases over several generations in the presence of predators is an example of an adaptation. The fish decreasing its bright skin is the new trait developed as a result of the presence of predators, and as stated, adaptation occurs over several generations not within one generation.

this protocol provides a detailed procedure for total protein extraction for western blot analysis from achieved samples following trizol isolation of rna.

a- all cells come from pre-existing cells