According to the endosymbiosis theory, scientists believe that early eukaryotes formed from prokaryotes. why do scientists believe that
prokaryotes existed earlier than eukaryotes?

D. Certain eukaryote cell structures resemble prokaryotes.

Explanation:

I just did the test

True statement gravity force is more on bigger mass, less on smaller mass.all mass fall on planet with same acceleration and speeds

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.