List several examples that illustrate how the structure of a body makes possible its function

The functional role arises from the way the body part is built. For an instance, the arrangement of bones and muscles in the human hand with its long jointed fingers, make grasping possible. Also, the heart's powerful muscular wall can contract and propel blood out of the chambers into the blood vessels and heart valves preserve blood moving in the appropriate direction. Other examples could be: a shoulder rolling in its socket, an elbow bending, and a bicep pulling up on a forearm to lift an object.

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.