Question

In the structure of a leaf, specialized cells function as gates that open and close to allow gases to pass into and out of the leaf. If you were to test the gases passing out of the leaf at night, what would you observe?

Answer 1

Normally the plants keep their stomatas closed at the night. The plants with CAM methabolism are exception: during the night, when the stomata is open it takes in the CO2 and stores it in organic acids.