Question

A vascular bundle having both xylem and phloem on same radii is called

• A. Concentric
• B. Spiral
• C. Radial
• D. Conjoint

Answer 1

Answer: (D)

Conjoint

Based on the relative position of xylem and phloem, the vascular bundles are classified into:

1)Radial Vascular bundles: When xylem and phloem within a vascular bundle are arranged in an alternative manner (on one next to another) on different radii, the arrangement is called as radial vascular bundles. It is found in roots of dicots and monocots.

2)Conjoint Vascular bundles: When xylem and phloem are situated on the same radii of vascular bundles, the arrangement is called as conjoint and the vascular bundle is called as conjoint vascular bundles. Such vascular bundles are common in stem and leaves of dicots and monocots.

So, the correct answer is 'Option D- Conjoint'.