Question:

The lower surface of leaf will have more number of stomata in a

Updated On: Jul 7, 2022
  • dorsiventral leaf
  • isobilateral leaf
  • both (a) and (b)
  • none of these
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The Correct Option is A

Solution and Explanation

Transpiration is the evaporative loss of water by plants. It occurs mainly through the stomata in the leaves. Usually the lower surface of a dorsiventral (often dicotyledonous) leaf has a greater number of stomata while in an isobilateral (often monocotyledonous) leaf. There are almost equal number of stomata on both surfaces.
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Concepts Used:

Leaf

A primary function of the leaf is to provide nourishment for a plant. Leaves get this by extracting water from the earth and carbon dioxide from the air with the help of sunshine.

Parts of a leaf

Following are the parts of a leaf:

  • The top part of the leaf is the apex or tip that can be round, pointed, and smooth.
  • On most leaves, the lamina, or leaf blade, is the broadest part of the leaf.
  • A petiole is a leaf that links to the plant stem.
  • Stipules, which are little green addendums near the base of the petiole, can also be seen on leaves.
  • Most leaves have a midrib that branches out to initiate vascular tissue veins on the sides.
  • Margin refers to the leaf's outer border, which varies depending on the plant type.
  • At the bottom of the blade, the base is found; it can be flat, heart-shaped, and round.