Question

photosynthesis: stomata

1. water vapor can escape from open stomata. suggest why stomata

are able to close.

Explanation:

Answer:

Stomata close to prevent excessive water loss (transpiration) from the plant, especially in conditions like drought, high temperature, or low humidity. Closing stomata helps the plant conserve water while still balancing the need for gas exchange (taking in carbon dioxide for photosynthesis and releasing oxygen) when necessary. For example, during dry periods, if stomata remained open, the plant would lose too much water vapor and risk dehydration, so closing them reduces water loss while temporarily limiting gas exchange until conditions improve.