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Question

Identify the cells given in the image below and their function.


  1. Guard cells; controlling size of stomata

  2. Companion cell; controlling size of vessels

  3. Parenchyma cell; controlling size of stomata

  4. Guard cells; controlling size of vessels


Solution

The correct option is A

Guard cells; controlling size of stomata


The figure shows stomatal guard cells. These cells act as gatekeepers, controlling the size of stomata. They can also close and open the stomata based on the plant’s requirement of carbon dioxide and water. Also, the by-product of photosynthesis, oxygen, is given out through the stomatal pore. 

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