Transpiration: Factors and Mechanism · NCERT Biology

In a dorsiventral (dicotyledonous) leaf, stomata are usually:

  1. Present only on the upper epidermis
  2. More numerous on the lower epidermis
  3. Equally distributed on both surfaces
  4. Absent on the lower epidermis
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Correct answer: More numerous on the lower epidermis

Dicot leaves are dorsiventral and typically have more stomata on the lower surface to reduce excessive water loss. In isobilateral (monocot) leaves, they are usually about equal on both surfaces.

Difficulty: Medium Question 9 of 20

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