Question

As compared to daytime, the amount of carbon dioxide released by the plants during night is more because :

• A. It is not produced during daytime.
• B. It is stored in the leaves of plants during daytime.
• C. Major amount of carbon dioxide produced is used up for photosynthesis during daytime.
• D. Plants do not respire during daytime.

Hint:

Plants respire all the time but photosynthesis happens only in sunlight — this balances CO$_2$ levels.

Answer 1

The Correct Option is C

Plants release carbon dioxide (CO$_2$) constantly through respiration. During the day, photosynthesis utilizes the CO$_2$ produced by respiration to create food, resulting in a lower net CO$_2$ release. At night, without sunlight, photosynthesis ceases, but respiration continues. Therefore, more CO$_2$ is released at night.