Question

Find the statement that is NOT correct with regard to the structure of monocot stem.

• A. Vascular bundles are scattered.
• B. Vascular bundles are conjoint and closed.
• C. Phloem parenchyma is absent.
• D. Hypodermis is parenchymatous.

Hint:

In monocot stems, the hypodermis is typically made of sclerenchyma, providing rigidity and support. Parenchyma is usually found in the ground tissue and is responsible for storage and metabolic activities.

Answer 1

The Correct Option is D

Let's evaluate each statement: (1) Vascular bundles are scattered: This is correct. In monocot stems, vascular bundles are scattered throughout the ground tissue, unlike dicots where vascular bundles are arranged in a ring. (2) Vascular bundles are conjoint and closed: This is also correct. In monocots, the vascular bundles are conjoint (xylem and phloem are arranged together) and closed (no cambium between xylem and phloem). (3) Phloem parenchyma is absent: This is correct. Monocot stems generally lack phloem parenchyma, and the phloem consists mainly of sieve tubes and companion cells. (4) Hypodermis is parenchymatous: This is NOT correct. In monocot stems, the hypodermis is usually sclerenchymatous, providing structural support, not parenchymatous. Thus, the correct answer is "Hypodermis is parenchymatous."