What do the guard cells in the dermal tissue of a plant do?A.Control the passage of carbon dioxide, oxygen, and water vaporB.Form a hard covering that turns into lignin and woodC.Allow the plant to move in response to sunlightD.Extend into the soil and increase the surface area of the rootSUBMITarrow_backPREVIOUS
Question
What do the guard cells in the dermal tissue of a plant do?A.Control the passage of carbon dioxide, oxygen, and water vaporB.Form a hard covering that turns into lignin and woodC.Allow the plant to move in response to sunlightD.Extend into the soil and increase the surface area of the rootSUBMITarrow_backPREVIOUS
Solution
The guard cells in the dermal tissue of a plant control the passage of carbon dioxide, oxygen, and water vapor. These cells are located on the leaf surface and are responsible for opening and closing the stomata, which are small openings used for gas exchange. When the guard cells are filled with water, they swell, causing the stomata to open. This allows carbon dioxide to enter the leaf for photosynthesis, and excess oxygen and water vapor to exit. Conversely, when the guard cells lose water, they shrink, causing the stomata to close and prevent water loss. Therefore, the correct answer is A. Control the passage of carbon dioxide, oxygen, and water vapor.
Similar Questions
How does the structure of dermal tissue allow it to carry out its function?A.Its cells are small and tightly packed in order to form a protective covering for the plant.B.Its cells have thick, fibrous cell walls that provide strength and flexibility to the plant.C.Its cells are narrow, hollow tubes with pits that allow water to be transported throughout the plant.D.Its cells have large vacuoles that can expand to store sugars and water for the plant.SUBMITarrow_backPREVIOUS
What is the use of guard cells?
The guard cell is surrounded by epidermal cell.TrueFalse
All of the following are the features of guard cells except These are the only epidermal cells that contain chloroplastsGuard cells can undergo rapid turgor changesThe opening and closing of the stomatal pore is a function of guard cellsTheir outer and lateral walls are comparatively thicker than inner wall
Plants have leaves which contain guard cells and palisade cells. Explain how each of these kinds of cell assists photosynthesis. Guard cells
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