15 How do cells maintain homeostasis without using energy? A Membrane proteins breakdown molecules to move other molecules from low
concentration to high concentration
B Membrane proteins use the negative charge inside of the cell to increase the
concentration of a chemical inside of the cell
C Maintaining osmotic balance by taking in or releasing water to match the water
concentration of the extracellular environment
D Form the cell membrane around food to create a vacuole that is kept separate
from the rest of the cytoplasm while enzymes break down the food

The direction a chemical reaction occurs is represented by an arrow 

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.