Question

From one trophic level to the next, about _____ % energy is passed on.

• A. 5
• B. 10

Answer 1

The correct option is B 10

Primary consumers do not get 100% of the sun’s energy from the producers or the plants on which they feed. This is because only some amount of the sun’s energy is utilised by the plant to synthesise their food. In fact, they only get 10% of the energy. This is termed as the 10% Rule, which states that only 10 per cent of the energy available gets passed onto the next level of consumers.