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NDA 2019 GAT · General Knowledge · Ecology and Environment · medium

In the food chain grass -> grasshopper -> frog -> snake, if the grass has 10000 J of energy and 10 per cent is passed on at each level, the snake gets

Single correct option

In the food chain grass -> grasshopper -> frog -> snake, if the grass has 10000 J of energy and 10 per cent is passed on at each level, the snake gets
  1. A. 1 J
  2. B. 100 J
  3. C. 1000 J
  4. D. 10 J
Show answer and solution

Answer: (D) 10 J

Energy passes as 10000 -> 1000 J (grasshopper) -> 100 J (frog) -> 10 J (snake). There are three transfers, so the energy is reduced by a factor of 10^3. Choosing 100 J counts only two transfers.
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Original question written in the NDA 2019 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