Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Which of the following statements regarding the maintenance of carbon cycle in the biosphere are correct? (1) Plants utilise solar energy to convert CO2 and water into cellular materials and produce oxygen that animals consume (2) Energy used by an animal comes from the oxidation of plant material releasing CO2 and water (3) All decaying organic matter on the earth is ultimately degraded by moulds and bacteria to yield CO2 that escapes into the atmosphere (4) Oxygen produced by the plants during carbon assimilation is not a by-productA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: A
Solution :
Plants utilize solar energy to convert carbon dioxide and water into cellular materials and produce oxygen that animals consume. Energy used by an animal comes from the oxidation of plant material releasing carbon dioxide and water. All decaying matter on the earth is ultimately degraded by moulds and bacteria to yield carbon dioxide that escapes into the atmosphere.
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