One group of organisms in the phylum chordata have the ability to tie themselves in knots and secrete large amounts of mucous/slime. what is this organism?

The correct answer for the question above is Hagfish.
They have a skull made of cartilage but lack jaws and vertebrae. They swim in a snake-like fashion by using their segmental muscle to exert force against their notochord. They have small eyes, brain, ears, and a nasal opening that connects with its pharynx. They also have tooth formations made of keratin and can tie themselves into a hang knot and also produce slime which allows them to escape humans. 

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. 

Bis the