A scientist is comparing ribosomes in a prokaryotic cell and a eukaryotic cell. Which is a property of the ribosomes from the eukaryotic cell only and not the prokaryotic cell? A. Proteins are assembled on ribosomes.
B. Some of the ribosomes are attached to the cell membrane.
C. Some of the ribosomes are located on the endoplasmic reticulum.
D. All of the ribosomes are distributed evenly throughout the cytoplasm.
E. All of the ribosomes are attached to the cell membrane.

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.