Question

In a dorsiventral leaf, the position of xylem

• A. Xylem surrounds phloem.
• B. Xylem is towards adaxial epidermis.
• C. Xylem is surrounded by phloem.
• D. Xylem is towards abaxial epidermis.

Hint:

Remember: In dorsiventral leaves, xylem faces the upper (adaxial) side, and phloem faces the lower (abaxial) side.

Answer 1

The Correct Option is B

In dorsiventral (dicotyledonous) leaves, the vascular bundles are arranged such that the xylem is oriented towards the upper side, i.e., the adaxial (upper) epidermis, and the phloem is directed towards the lower side, i.e., the abaxial (lower) epidermis.
This orientation supports optimal transport of water to photosynthetic cells on the upper side of the leaf while transporting the synthesized food from the lower phloem side.
Hence, in a dorsiventral leaf, xylem lies towards the adaxial (upper) epidermis.

Answer 2

Explanation:

A dorsiventral leaf is a typical dicot leaf characterized by distinct upper (adaxial) and lower (abaxial) surfaces.

In the vascular bundles of a dorsiventral leaf, the xylem and phloem are arranged in a specific way called collateral vascular bundles.

Here, the xylem is positioned towards the upper side of the leaf, which is the adaxial (or dorsal) epidermis. The phloem lies towards the lower side, the abaxial (or ventral) epidermis.

This arrangement supports efficient transport of water (via xylem) from the stem to the leaf and distribution of food (via phloem) from the leaf to other parts of the plant.

Correct Answer: Xylem is towards adaxial epidermis.