|An opening stomata of a tomato leaf|
Question 1 : Why does the stomata close during hot weather?
Stomata, also known as stoma, close in hot weather to retain water. Even though open stoma are necessary for photosynthesis, they can dry out a plant. About 90% of water absorbed by a plant is lost through open stoma. The guard cells close the entrance for protection against dehydration.
|An opening stomata of rose plant|