0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Opening and closing of stomata is achieved by the guard cells?
By endo-osmosis and exo-osmosis.
Do all plants have guard cells?
yes all plants have guard cells because if there's a plant that don't have guard cells the stomatal pores will not open neither close
Which structure is responsible for the opening and closing of stomata?
guard cells
How is the lost water in stomata replaced?
The guard cells of the stomata have greater osmotic pressure due to loss of water. Thus, by way of osmosis this loss is compansated continuously from the surrounding cells of the stomata.
What regulates the size of the stomata on a leaf?
The guard cells synthesize glucose through photosynthesis in the presence of light. as glucose accumulates, osmotic pressure increases and this enables them to draw water from adjacent epidermal cells by osmosis. this makes the guard cells turgid and the stomata opens. at night, there is no photosynthesis and therefore glucose levels go down leading to lowering of osmotic pressure. guard cells lose turgidity and become flaccid and therefore stomata closes. Am sure you can derive your answer from this.
Opening and closing of stomata is achieved by the guard cells?
By endo-osmosis and exo-osmosis.
What are stomata used for?
Releasing water vapor from plants. Guard cells use osmosis, the simple diffusion of water, to open and close letting certain amounts of water out.
Do all plants have guard cells?
yes all plants have guard cells because if there's a plant that don't have guard cells the stomatal pores will not open neither close
What is the role of guard cells do in the leaf?
Guard cells change shape to open and close stomata. When they are flaccid, the stoma is closed. When they are full of water and firm, the stoma is open. There are 2 guard cells controlling a stoma. Water enters guard cells by osmosis and they change shape.
Is it true that guard cells of non desert plants often close during the daytime and open at night to conserve water?
The guard cells of non desert plants simply contract a bit but do not close. Desert plants close their guard cells.
What cells guard the opening and closing of the stomata?
Stomatal pores in plants regulate the amount of water and solutes within them by opening and closing their guard cells using osmotic pressure. Guard cells and adjacent subsidiary cells are involved in opening and closing of stomata.
Why are Guard cells important?
Guard cells are important in plants for various reasons. They are the ones that will control the processes of gas exchange and protect the plants from excessive water loss.
How does stomata open?
The stomata's function is to allow gas exchange with the surrounding air, so that the plant can intake carbon dioxide and oxygen. Stomatal opening is favored when there is plentiful water and moderate temperatures. Abscissic acid, a plant hormone, acts on the guard cells to open and close stomata. Some plants are even genetically engineered with a mutated era gene, which makes them more sensitive to abscissic acid and more prone to the opening and closing of guard cells. When guard cells are full of water, they stretch away from each other and the stomata are open. When guard cells are limp, they fall on each other and the stomata are closed. Potassium ions play a role in the opening and closing of stomata by changing the concentration of ions in the guard cells. When the potassium ions are in the guard cells, water also flows in the guard cells because of osmosis and the stomata open. When the potassium ions are out of the guard cells, water also flows out of the guard cells because of osmosis and the stomata close.
What is the importance of guard cells?
If by guard cells you mean the ones located in plants, they open and close the stomata to control water loss :)
One example of osmosis?
Osmosis is the movement of water from a high concentration to a low concentration through a semi-permeable membrane. This occurs in the roots of plants and is transported by the xylem and phloem to the leaves, encouraging photosynthesis.
Why do plants have very few guard cells?
Guard cells are usually found on the underside of leaves and they are few in number in order to reduce water loss.
What cell in a leaf are like a balloon?
The guard cell of stomata look like a balloon when it is turgid. Two such cells form the pore of the stomata. When both guard cells of a stomata are deflated by exo-osmosis the stomatal pore is closed.
