Question

A student observed the T.S. of a plant organ slide under microscope. He observed the vascular bundles in the stelar region as conjoint collateral and open. Based on these features of vascular bundle, identify the correct option from below.

• A. Monocot Root
• B. Monocot Stem
• C. Dicot Root
• D. Dicot Stem

Hint:

In dicot stems, vascular bundles are usually open and arranged in a ring. This is different from the scattered, closed bundles in monocots.

Answer 1

The Correct Option is D

• Vascular Bundle Types: Vascular bundles can be arranged differently in monocots and dicots. In dicot stems, the vascular bundles are typically arranged in a ring and are conjoint (xylem and phloem occur together), collateral (phloem lies outside the xylem), and open (vascular cambium is present between xylem and phloem).
• Monocots vs Dicots: In monocots, vascular bundles are scattered throughout the stem and are usually closed, without a vascular cambium.
• Conclusion: The observation of conjoint, collateral, and open vascular bundles is characteristic of dicot stems.