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NDA 2024 GAT · General Knowledge · Ecology and Environment · hard

According to the ten per cent law of energy flow in an ecosystem, the energy available at the next trophic level is about

Single correct option

According to the ten per cent law of energy flow in an ecosystem, the energy available at the next trophic level is about
  1. A. 90% of the energy of the previous level
  2. B. 50% of the energy of the previous level
  3. C. 10% of the energy of the previous level
  4. D. 1% of the energy of the previous level
Show answer and solution

Answer: (C) 10% of the energy of the previous level

Only about 10% of the energy of one trophic level is stored in the next one; the rest is lost as heat in respiration and other activities. This is why food chains are short and there are fewer carnivores than herbivores. The figure 90% is the amount lost.
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Original question written in the NDA 2024 GAT pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake