question_answer

Under conditions of constant illumination, the compensation period for a whole aquarium would be of infinite length when

A) The biomass of animals equals the biomass of plants

B) The respiratory exchanges of the animals are equal to the photosynthetic exchanges of the plants

C) The oxygen intake of the animals equals of oxygen output of photosynthesis

D) The carbon dioxide output of the animals and plants equals to the photosynthetic intake of the plants