Well, Depending on how old you are, it could be a growth plate.
The stoma opens and closes to allow gas exchange. The Guard cells are located around the stoma and regulate the opening and closing of the stoma.
stoma
Stoma tend to be closed on a hot day to minimize water loss through transpiration, as high temperatures can increase the rate of transpiration. This helps the plant conserve water and maintain proper hydration levels.
Stoma or stomata
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Stoma of the leaf.
Stoma (or plural form stomata for a number of stoma)
Stoma (or plural form stomata for a number of stoma)
Plant pores are called stomata (pl.) or stoma or stomate (sing.).
The stomata closes duirng the night when there is no light, this is because photosynthesis only takes place during the light and that is when the stoma is open , to let in carbon dioxide for photosynthesis. Otherwise it is closed. =D hope this helps
The stoma of a plant is surrounded by two specialized cells called guard cells that regulate its opening and closing. These guard cells control gas exchange and water loss in the plant.
The leaves of a plant absorb carbon dioxide during photosynthesis. Carbon dioxide enters the plant through small openings called stomata on the surface of the leaves.