Sunlight.
No Guard cells are cells that close when there is dry weather, preventing the leaf from becoming dehydrated
Epidermis
In the palisade cells, spongy cells, and guard cells.
its function is to absorb sunlight for photosynthesis
Guard cells contain chloroplasts, which are responsible for photosynthesis, and a large central vacuole that regulates the opening and closing of stomata. These organelles are absent in the skin cells of a leaf.
Pores, known as stomata, are surrounded by two specialized cells called guard cells in the epidermis of a leaf. These guard cells control the opening and closing of the stomata, regulating the entry of carbon dioxide for photosynthesis and the release of oxygen and water vapor. They help to maintain the balance of gas exchange and water regulation in the leaf.
Palisade cells, spongy mesophyll cells, and guard cells contain chloroplasts in leaves. Palisade cells are located in the upper leaf epidermis, spongy mesophyll cells are below the palisade layer, and guard cells surround the stomata.
Guard cells are the two curved cells on either side of the pore (hole). By changing their shape they can open or close the pore. When the guard cells absorb water they bend outwards, so that the pore between them opens up. When they lose water they go back to a less curved shape, closing the pore between them. Guard cells bend outwards when they absorb water because the wall next to the pore is thicker than the outer wall, so blah it stretches less. Usually, stomata open in the day to let carbon dioxide into the leaf for photosynthesis and to let oxygen (made by photosynthesis) out of the leaf. They close at night, when photosynthesis cannot take place, to prevent the escape of water. Improved answer- Guard Cell
Guard cells are the two curved cells on either side of the pore (hole). By changing their shape they can open or close the pore. When the guard cells absorb water they bend outwards, so that the pore between them opens up. When they lose water they go back to a less curved shape, closing the pore between them. Guard cells bend outwards when they absorb water because the wall next to the pore is thicker than the outer wall, so blah it stretches less. Usually, stomata open in the day to let carbon dioxide into the leaf for photosynthesis and to let oxygen (made by photosynthesis) out of the leaf. They close at night, when photosynthesis cannot take place, to prevent the escape of water. Improved answer- Guard Cell
in guard cells......believe me!
Chloroplasts in leaf cells absorb energy from the sun