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
none
Stoma of the leaf.
Stoma (or plural form stomata for a number of stoma)
Stoma (or plural form stomata for a number of stoma)
Abscisic acid (ABA) primarily functions to close the stomata in plants. When plants experience water stress, ABA levels increase, signaling the guard cells to reduce water loss by closing the stomata. This response helps conserve water during drought conditions, allowing the plant to maintain its internal water balance.
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.