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| Q. |
The opening and closing of the stomatal pores is a function of the - |
| A. | Guard cells |
| B. | Chloroplast |
| C. | Xylem |
| D. | Phloem |
| Answer» A. Guard cells | |
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Explanation: The opening and closing of the pores is a function of the guard cells. They swell when water flows into them, causing the stomatal pore to open and likewise, the pore closes if the guard cells shrink. |
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