Which two methods could be used to reduce the rate of erosion in a given region? a) increase plant cover to protect soil from being blown away by wind. b) use retaining walls to hold weathered rock on steep slopes in place. c) use various human-made methods to break up large boulders into small pieces. d) create fast-flowing, artificial streams to carry soil away from its original location.

A) Increase plant cover & B) use retaining walls

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.