Read the following statements about carbon cycle. (I) About…

Biology Ecosystem Statement Based Questions Single Correct MCQ

Published on: August 21, 2026

Read the following statements about carbon cycle.

(I) About 4 ×1013 kg of carbon is fixed annually in the biosphere through photosynthesis.

(II) Carbon return to the atmosphere asCO 2 through respiration by producers and consumers.

(III) Decomposers returnCO 2 to the atmosphere by processing of waste materials and dead organic matter of land or oceans.

(IV) Burning of wood, combustion of organic matter, volcanic activities, etc., release CO 2 into the atmosphere.

Choose the correct option.

Both statements (I) and (II) are true, but (III) and (IV) are false

Both statements (I) and (II) are false, but (III) and (IV) are true

All statements are true

All statements are false

Text Solution

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The correct answer is:

All statements correctly describe different processes involved in the carbon cycle, including fixation, respiration, decomposition, and combustion.

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