Which following groups is a population? A. All of the living things that interact within a forest ecosystem B. All of the living things and nonliving things that interact within a forest ecosystem C. All of the insects living in a forest ecosystem D. All of the white- tailed deer living in a forest ecosystem

I would have to say A. Since groups of the same populations and different populations interact within each other. Biotic Factor are living things living in the ecosystem and all of these options ( except A) are biotic facotors.

TT :dominant

Bb : heterozygous

DD : dominant

Dd : heterozygous

ff :  homozygous recessive

bb : homozygous recessive

Explanation: two capitals are dominant two lowercase are recessive and one capital and one lowercase is heterozygous