Which of the following describes how biological chemicals provide evidence to support that life changes over time?
a. some animals exhibit similar proteins
b. some animals exhibit similar structures, possibly due to a common ancestor
c. some animals exhibit structures that are no longer used for any purpose
d. some animals exhibit similar stages of embryonic development

Your answer is A. Some animals exhibit similar proteins.

(I deleted the other answers so future viewers won't get confused.)

Just dont put scarce

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.