Question

Under condition 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 photosynthesis exchanges of the plants.
• C. The oxygen intake of the animals equal of oxygen outputs of photosynthesis.
• D. The carbon dioxide output of the animals and plants is equal to the photosynthetic intake of the plants.

Answer 1

The correct option is D The carbon dioxide output of the animals and plants is equal to the photosynthetic intake of the plants.

During compensation period, the carbon dioxide output of the animals and plants equal to the photosynthetic intake of the plants. Compensation point for light at which the rate of carbon dioxide uptake is exactly balanced by the rate of carbon dioxide production or equivalently, the light intensity at which the rate of oxygen production is exactly balanced by the rate of oxygen consumption.

So, the correct answer is option D.