Consider the following statements:
1. Dissolved carbon dioxide and bicarbonates are present in large quantities in oceans.
2. Atmospheric carbon dioxide is recovered through the process of respiration.
3. During the process of decomposition the carbon dioxide is released back into the atmosphere.

How many of the above statements are true with respect to the nutrient cycle?
(a) Only one
(b) Only two
(c) All three
(d) None of the above

Question

Consider the following statements:
1. Dissolved carbon dioxide and bicarbonates are present in large quantities in oceans.
2. Atmospheric carbon dioxide is recovered through the process of respiration.
3. During the process of decomposition the carbon dioxide is released back into the atmosphere.

How many of the above statements are true with respect to the nutrient cycle?
(a) Only one
(b) Only two
(c) All three
(d) None of the above

ONLiNE UPSC · Accepted Answer

Statement 1 is correct: Atmospheric carbon dioxide is the source of all carbon in both living organisms as well as in the fossils (used as fossil fuel). It is highly soluble in water. Oceans also contain large quantities of dissolved carbon dioxide and bicarbonates.

Statement 2 is correct: Respiration is a metabolic process reverse of photosynthesis in which food is oxidized to liberate energy (to perform the various life processes) and carbon dioxide and water. Thus the carbon dioxide of the atmosphere is recovered through this process.

Statement 3 is correct: After the death of the organisms the decomposers break down the remaining dead organic matter and release the leftover carbon back into the atmosphere.

Nutrient Cycle

Carbon Cycle

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M Question 1	⏱ 0
Consider the following statements: 1. Dissolved carbon dioxide and bicarbonates are present in large quantities in oceans. 2. Atmospheric carbon dioxide is recovered through the process of respiration. 3. During the process of decomposition the carbon dioxide is released back into the atmosphere. How many of the above statements are true with respect to the nutrient cycle? (a) Only one (b) Only two (c) All three (d) None of the above