Changing your toilet can reduce water pollution because a. the sewage is partially treated in the toilet before entering the sewer system b. chemicals added by new toilets neutralize the pathogens in the water c. more efficient plumbing uses more water and creates larger volumes of waste d. more efficient plumbing uses less water and creates smaller volumes of waste

I'm guessing answer d?

Cis correct i think

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.