Question

Flow of energy is unidirectional in an ecosystem because in each trophic level.

• A. Number of consumers is constant
• B. Number of consumers reduces
• C. Loss of energy is more than the amount of available energy
• D. Energy does not revert back to previous trophic levels

Answer 1

The correct option is D Energy does not revert back to previous trophic levels

Energy flow in an ecosystem is always unidirectional in nature because most of the energy is released at the trophic level in the form of heat and performing metabolic activities. Hence 10% is transferred from one trophic level to another. This makes the unidirectional flow of energy, which means it does not revert back or reuse, it lost as heat energy.

So the correct answer is option D.