Multiple choice

The opening of stomata is also aided due to the

  1. orientation of the microfibrils in the cell walls of guard cells

  2. orientation of the microfibrils in the cell walls of subsidiary cells

  3. Both

  4. None
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A Correct answer
Explanation

The radial orientation of cellulose microfibrils in the guard cell walls allows them to expand primarily in length rather than width when turgid, which pulls the stomatal pore open.

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