Which of the following are not abiotic factors of an ecosystem? a. water abundance b. temperature c. day length d. herbivores

The answer is: D
This is because abiotic means something that is not alive, or a living organism
Water abundance, is something that is not a living organism, as are the options.
Herbivores is a group of organisms that usually eat plants, meaning they are alive.
Hope it helps !

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.