Question

The most appropriate part of leaf epidermis in a dicot plant to observe stomata and guard cells would be on

• A. Dorsal side
• B. Ventral side on midrib
• C. Veins
• D. Any part on ventral but not midrib

Answer 1

The correct option is D

Any part on ventral but not midrib

The correct option is D.

Explanation of the Correct Option:

• The ventral side refers to the lower surface of the leaf, while the dorsal side refers to the upper surface of the leaf facing apical meristem.
• The dorsal side has more pigment than the ventral side in dicot leaves.
• The ventral side of the dicot leaf has more stomata surrounded by guard cells than the dorsal side to reduce the transpiration rate.
• The midrib is the vein present at the center of the leaf that does not contain any stomatal openings.

Explanation of Incorrect options:

Option A:

• The dorsal side or the upper side of the leaf has fewer stomata to reduce transpiration.

Option B:

• The midrib of the leaf does not contain stomata.

Option C:

• Veins do not have stomatal openings.

Therefore, the most appropriate part of the dicot leaf to observe stomata and guard cells would be the ventral side but not the midrib.