Question

Loss of energy from one trophic level to next higher trophic level is

• A. $10\%$
• B. $90\%$
• C. $40\%$
• D. $60\%$

Answer 1

The correct option is B $90\%$

The flow of energy in a food chain
The sequence of the energy flow in the ecosystem is studied in the form of a food chain with various trophic levels (nutritional status) and is as follows:-
Producers (plant) → Primary consumers → Secondary consumers

Features of the energy flow
The energy flow decreases as we go up the trophic levels due to the $10\%$ law. The law states that only $10\%$ of the energy is transferred to each trophic level as we go up the trophic levels. Hence, the number of trophic levels is limited.
The energy flow is unidirectional

Loss of energy in the food chain
When there is the flow of energy in the food chain, $90\%$ of the energy is lost as heat due to incomplete digestion or respiration by the organisms. This follows the $10\%$ law.

Final answer
d. 90%