Question

The shape of the guard cells changes due to change in the

• A. Protein composition of the cells.
• B. The temperature of cells.
• C. Amount of water in cells.
• D. Position of the nucleus in the cells.

Answer 1

The correct option is C

Amount of water in cells.

The correct option is C.

Explanation of the correct option:

• The guard cells are present around the stomatal pore.
• The change in the shape of guard cells causes the stomata to open or close.
• The elevated amount of water in guard cells causes them to swell. It will open the stomatal pore.
• The fall in the amount of water in guard cells causes them to shrink. It will close the stomatal pore. Hence, this statement is correct.

Explanation of the incorrect options:

Option A:

• The change in protein composition of guard cells does not change their shape.

Option B:

• The guard cells do not change their shape due to any changes in the surrounding temperature.

Option D:

• The nucleus position in the guard cells does not change.

Final answer: The shape of the guard cells changes due to a change in the amount of water in the cells.