Which of the following is not a limitation of the biological species concept? A. The biological species concept doesn't address how isolation mechanism can change over time
B. The biological species concept doesn't address reproductive isolation
C. The biological species concept doesn't address extinct species
D. The biological species concept doesn't address asexually reproducing species

Im assuming this is a multiple choice answer what is the answers to chooce from?

The answer would be c, white eyes are homozygous recessive. in the early 1900s, morgan conducted several experiments with vinegar  flies (drosophila). one  sample revealed an anomaly: a  white-eyed, single male fly. he attempted to breed this fly with the typical red-eyed females. the offspring were all red-eyed. using flies from this new generation (brother-sister pairs)  produced some red-eyed and a few white-eyed flies. the white-eyed were all male. in later experiments, he was able to produce white-eyed females. this proved that white eyes are not lethal to either sex (ruling out a and b). since the percentage of white eyes to red eyes is so low, white eyes are not a dominant trait. it would be a recessive trait.