Question

In the given food chain if the amount of energy at the fourth trophic level is 4 kJ, what will be the energy available at the producer level? Grass → Grasshopper → Frog → Snake​

Answer 1

Explanation:

According to the 10 per cent law, only 10 per cent of the energy available in a trophic level is passed on to the next level. Hence, if the amount of energy available at the fourth trophic level is 5 kJ, the energy available at the producer level will be 5,000 kJ: 5 → 50 → 500 → 5,000.

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Answer 2

Answer:

So we know that trophic level 4, has a total of 5kj of energy, i.e., 5000 J of energy...

According to 10% law, the trophic level succeeding a trophic level obtains only 10% of the energy from its previous trophic level.

Which means, the third trophic level had

=> 5000= 10/100* x

=>x= 50,000 J

So the second trophic level had

=> 50,000= 10/100* x

=> x = 500,000 J

So we arrive at our answer , the first trophic level, or the producers stored a total energy of,

=> 500,000= 10/100* x

=> x = 50,00,000 J

Answer- the producer's trophic level stored a total of 5,000 kj of energy

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