Question

1. for most types of plants, their stomata are usually open during the day and closed at night. explain why.

4 these are photographs of real stomata created using different

Explanation:

Answer:

Stomata are pores on plant leaves (and other organs) that regulate gas exchange and water loss. During the day, light is available for photosynthesis. Stomata open to allow the entry of carbon dioxide (\( \text{CO}_2 \)), which is a key reactant for photosynthesis (the process where plants convert light energy into chemical energy, producing glucose and oxygen). At night, there is no light for photosynthesis, so the need for \( \text{CO}_2 \) intake is absent. Closing stomata at night helps plants conserve water (since water vapor exits through open stomata via transpiration) and also reduces the risk of excessive water loss when photosynthesis isn’t occurring. Additionally, keeping stomata closed at night can prevent the entry of unnecessary gases and limit potential water loss in the dark when the plant’s metabolic demands for gas exchange are lower.