Question

The condition under which transpiration would be most rapid

• A. High humidity
• B. Excess of water in soil.
• C. Low humidity, high temperature, guard cells are turgid (open) and most soil.
• D. Low velocity of wind.

Answer 1

The correct option is C Low humidity, high temperature, guard cells are turgid (open) and most soil.

Transpiration is the loss of water in the form of water vapor from the parts of the plant. This takes with the help of stomata that are mostly present on the lower surface of leaves. Their opening and closing is controlled by specialized cells called guard cells and depends upon the turgor pressure in them. When the guard cells are turgid the stoma opens causin water loss. Transpiration will be favored at low humidity, high temperature and moist soil. Thus the correct answer is option C.