Four groups of organic compounds found in living organisms are proteins carbohydrates lipids and nuclei acids. Which element is a main component in nucleic acids but not in the other three organic compounds?

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. 

Aclimax community is described as a biological community of plants,animals, and fungi. the climax community is the final stage of succession, meaning its going to be unchanged till it is destroyed (by a fire i i hope this is a good description : '3