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The Chloroplast

If CO2 is g...

Question

If $C O_{2}$ is given off in respiration then why does the amount of $C O_{2}$ in the atmosphere remains relatively constant?

C O_{2}

forms carbonate rocks.

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C O_{2}

is buffer.

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C O_{2}

is converted in photosynthesis to carbohydrate.

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C O_{2}

splits up during photosynthesis.

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Solution

The correct option is C $C O_{2}$ is converted in photosynthesis to carbohydrate.
Respiration is the process wherein living organisms take in atmospheric oxygen and release $C O_{2}$ in the atmosphere. Photosynthesis is the process wherein green plants fix atmospheric carbon dioxide in presence of Sunlight into carbohydrates. So, carbon dioxide released into the atmosphere by respiration is counterbalanced by its photosynthetic fixation. Sunlight drives splitting of water during light reactions; carbon dioxide is fixed during dark reactions of photosynthesis. Carbonic acid is buffer and carbon dioxide is one of its dissociation products. The only fraction of atmospheric carbon dioxide is dissolved in the ocean and part of it makes carbonate rocks. Thus, the correct answer is option C.

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