Why are the fish able to survive in the pond?
1) the fish use carbon dioxide produced by the plants.
2) the fish use oxygen produced by the plants.
3) the plants use oxygen produced by the fish.
4) the plants use chlorophyll produced by the fish.

2, plants and animals need oxygen to survive. Plants produce oxygen through photosynthesis and release the oxygen into the pond water.

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.