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Question

The given figure shows the transfer of energy in an ecosystem. In the given food chain, 10,000 J of energy is available to the producers. Calculate and find the amount of energy available to the higher carnivores.

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A
1,000 J of energy
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B
100 J of energy
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C
10 J of energy
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D
1 J of energy
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Solution

The correct option is B 10 J of energy
In a food chain, only 10% of energy is passed onto the next trophic level. The remaining energy is lost in metabolic processes and as heat released during respiration. Thus, if originally 10,000 J of energy is available to the producers, at the second trophic level (herbivores), 10% of 10,000 J = 1000 J of energy will be available.
At the third trophic level (lower carnivores), 10% of 1000 J = 100 J of energy will be available.
At the fourth trophic level (higher carnivores), 10% of 100 J = 10 J of energy will be available.
Therefore, the correct answer is option C.

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