Which of these is a body fossil? a) dinosaur footprint b) wooly mammoth tusk c) shrimp burrow d) fossiled animal droppings

The correct answer is a woolly mammoth tusk. A body fossil is most likely to be a bone for future reference.

B)wooly mammoth tusk is a body fossil because they are remains part of the body of the mammoth that used to live long ago.  The body fossil is a hard part of a body from an animal or plant that used to live long ago. So, The mammoth is considered an animal that used to live long ago but is now extinct so the remains have become a body fossil.

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.