Mark the point on the Y axis that indicates the free energy of the reactants by moving the green arrow. Mark the point on the Y axis that indicates the free energy of the products by moving the red arrow. What letter represents the activation energy of the reaction in the presence of enzyme? What letter represents the activation energy of the reaction without enzyme present? Is the reaction exergonic or endergonic? How do you know?

The answer to this is b

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. 

It explains why rocks appear in layers

Other organisms can change their behavior to take the place of the plants in the ecosystem.