A)
X Y Oxygen Oxygen
B)
X Y Carbon dioxide Carbon dioxide
C)
X Y Carbon dioxide Oxygen
D)
X Y Oxygen Carbon dioxide
Correct Answer: A
Solution :
At night plants take in oxygen and release carbon dioxide. While at day time, plants take in carbon dioxide and release oxygen. Animals on the other hand, always take in oxygen and release carbon dioxide.You need to login to perform this action.
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