Assume that some members of an aquatic species of motile, photosynthetic protists evolve tobecome parasitic to fish. They gain the ability to live in the fish gut, absorbing nutrients as the fishdigests food. Over time, which of the following phenotypic changes would you expect to observe inthis population of protists?A) loss of chloroplastsB) gain of meiosisC) loss of motilityD) gain of a rigid cell wallE) no changes would be expected

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.

the answer is d. none of the above