1. describe why organisms compete and what the results of competition might be. 2. describe the symbiosis between a parasite and its host.

Organisms compete for food and results of competition could be a lowered amount of animals in a species or in drastic cases, extinction. The symbiosis between a parasite and it's host is parasitism and it's because the host is being harmed by the parasite, but the parasite is benefiting because it is drinking or feeding from its host.

From a high concentration to a low concentration.

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.