At each trophic level, in which form is the energy lost?

Heat

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Chemical

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Light

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None of the above

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Solution

The correct option is A Heat
Energy transformations are governed by the second law of thermodynamics. It simply states that whenever energy is transformed, there is a loss of energy in the form of heat. Similarly energy is lost as heat when it is transferred from one trophic level to another in a food chain/ food web.

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Question 8
In an ecosystem, the 10% of the energy available to the next trophic level is in the form of

(a) heat energy
(b) light energy
(c) chemical energy
(d) mechanical energy

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