In the given food chain, suppose the amount of energy at fourth trophic level is 5 kJ, what will be the energy available at the producer level?

Grass → Grasshopper → Frog → Snake → Hawk

(a) 5 kJ

(b) 50 kJ

(c) 500 kJ

(d) 5,000 kJ




According to the  Kj, only 10% of food energy is transferred from one trophic level to the next level.


10 Percent Law - Teachoo.jpg

Grass is the producer .

Therefore, the energy available at the producer level is 5000kJ.

So, the correct answer is (d).


10 Percent Law Grass 5000kJ 1st trophic level Grasshopper 500kJ 2nd trophic level Frog 50kJ 3rd trophic level Snake 5kJ 4th trophic level

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo