Question

stomata close when it's dark to​

Answer 1

Explanation:

Stomata are mouth-like cellular complexes at the epidermis that regulate gas transfer between plants and atmosphere. In leaves, they typically open during the day to favor CO2 diffusion when light is available for photosynthesis, and close at night to limit transpiration and save water.

Answer 2

However, these plants' stomata do not just close at night. If conditions aren't optimum, they may close them during the day. When a leaf gets too hot, for example, it closes its stomata to save its water and avoid drying out.

• However, when the stomata are closed, oxygen levels in the leaf can quickly approach lethal levels.
• This can only function for a brief period.
• Photorespiration occurs when the enzymes involved in photosynthesis bind to oxygen rather than carbon dioxide because there is too much oxygen in the leaf.