Question

Rate of transpiration in a dorsiventral leaf is

• A. Greater at the upper surface
• B. Greater at the lower surface
• C. Equal at both the surfaces
• D. None of the above

Answer 1

Answer: (B)

Greater at the lower surface

• The rate of transpiration in a dorsiventral leaf is greater at the lower surface.
• A dorsiventral organ is one that has two surfaces differing from each other in appearance and structure, as an ordinary leaf.
• More transpiration occurs on the lower surface of a dorsiventral leaf because the number of stomata present on the ventral side of the leaf is more than the number of stomata present on the dorsal side of the leaf.

So, the correct answer is 'Greater at the lower surface'.