Question

Do plants close stomata at night?

Answer 1

Stomata:

1. Stomata are small openings in the epidermis of leaves.
2. They allow the exchange of gases and hence are essential for photosynthesis.
3. Photosynthesis does not occur in the absence of light during the night.
4. However, respiration occurs in night, necessitating the diffusion of gases.
5. Stomata are not entirely closed at night, thus there is still some room for oxygen and carbon dioxide diffusion.