What is the difference between a eukaryotic cell and a prokaryotic cell?

The main difference between a eukaryotic cell and a prokaryotic cell is s presence of a nucleus. Namely, the prokaryotic cell has no nucleus. Its genetic material is free in the cytoplasm not coated by a membrane. Its DNA is short stranded. The prokaryotic cell also lacks in membrane-bound organelles. On the other hand, the eukaryotic cell has the nucleus. Its genetic material (long tangled strands of DNA) is not free in the cytoplasm, but it is packed in the nucleus. Presence of membrane-bound organelles is also a characteristic of the eukaryotic cell.

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.