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What is the significance of the shape of the pyramid of energy?

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What is the significance of the shape of the pyramid of energy?

(a) It shows decrease in energy

(b) It shows increase in energy

(c) It shows the direction of energy flow

(d) It shows the trophic levels

This question was posed to me in an interview for job.

My query is from Ecological Pyramids in chapter Ecosystems of Energy Management

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The correct option is (a) It shows decrease in energy

Explanation: Pyramid of energy is always upright in shape, this is because as energy lost as heat along food chains either used in respiration or lost due to heat. So there will be decrease in energy. Energy transformation is just about 10% for higher trophic levels.

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