During the carbon cycle, which of the following carbon compounds would be utilized as an energy source by heterotrophs?

Carbon dioxide

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Carbon monoxide

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Carbonic acid

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Organic molecules

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Solution

The correct option is D Organic molecules
Autotrophs, that is plants, utilize carbon in the form of carbon dioxide from the atmosphere and synthesize organic compounds. The heterotrophs consume these plants and utilise these organic compounds stored in them as a source of energy. Heterotrophs do not have the ability to utilize, carbon dioxide, carbon monoxide or other forms of carbon for energy.

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