Why is it that there is a much higher frequency of people with intermediate phenotypes than with extreme phentoypes? a. There are more intermediate genotypes possible.
b. There is an advantage to having the extreme phenotypes.
c. There are more mutations in the extreme phenotypes.
d. There are more extreme genotypes possible.

d.

explanation:

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.