think about genetic diversity and survival of the fitness", The text says that Daphnia starts reproducing sexually when the intensity of competition and predators increase. how would sexually reproducing help the species survive in its environment?

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."