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Question

If 1 kJ of energy is trapped at the producer level, how much energy will be available to the primary carnivores as food in the food chain?

A
10 J
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B
100 J
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C
1 J
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D
0.1 J
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Solution

The correct option is A 10 J
According to Lindemann's 10% law of energy transfer, only 10% of the energy available at any trophic level is transferred to the next trophic level.

In the given question 1000 J of energy is present at the producer, so 10% of this energy is available to primary consumers (herbivores) and 10% of herbivores energy available to primary carnivores (secondary consumers).

Energy to primary consumers = 1000×10÷100 = 100 J


Energy to primary carnivores = 100×10÷100 = 10J

Thus 10 J energy will be available to the primary carnivores as food in the food chain.

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