Homeostasis
Angiosperms or flowering plants maintain homeostasis by keeping their stomata (opening in the underside of a leaf that allows carbon dioxide to diffuse into and out of the leaf) open just enough to allow photosynthesis to take place but not so much that they lose an excessive amount of water. They regulate the opening and closing of their stomata to balance water loss with rates of photosynthesis.
Most of the time, the stomata are open during the daytime, when photosynthesis is active and closes at night, preventing any water loss.
Another way, they maintain homeostasis is by keeping the water content of the leaf constant (controlling transpiration). For example, when water is abundant, it goes into the leaf, increasing water pressure in the guard cells (control the opening and closing of stomata by responding to changes in water pressure) and opening the stomata. Then excess water is lost by transpiration through the open stomata. When there is not enough water, it decreases water pressure and the guard cells close the stomata. This limits transpiration, reducing further water loss.
Most of the time, the stomata are open during the daytime, when photosynthesis is active and closes at night, preventing any water loss.
Another way, they maintain homeostasis is by keeping the water content of the leaf constant (controlling transpiration). For example, when water is abundant, it goes into the leaf, increasing water pressure in the guard cells (control the opening and closing of stomata by responding to changes in water pressure) and opening the stomata. Then excess water is lost by transpiration through the open stomata. When there is not enough water, it decreases water pressure and the guard cells close the stomata. This limits transpiration, reducing further water loss.