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GK QUESTION#3621

In the source stomatal-apparatus diagram, two kidney-shaped guard cells surround a narrow central slit. The arrow labelled A ends on that central slit. What should replace A?

  1. AStomatal poreCorrect answer
  2. BMitochondria
  3. CNucleus
  4. DLamina
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Answer

A. Stomatal pore

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Explanation

The arrow A ends at the central opening between the two guard cells. This opening is the stomatal pore, which permits gas exchange and water-vapour loss.

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