OBJECTIVE FORESTRY

Detailed explanation-1: -The Dicot root contains radial vascular bundles. In the center, there is a small parenchymatous pith. It is also possible that dicot roots lack it. There are 2 to 6 vascular bundles in the dicot root.

Detailed explanation-2: -Presence of radial vascular bundles is the characteristic feature of roots. Those vascular bundles in which xylem and phloem are present on different radii are known as radial vascular bundles. In between xylem and phloem bundles parenchymatous cells are present. This is seen in roots of all vascular plants.

Detailed explanation-3: -So, the correct option is ‘Radial, exarch’.

Detailed explanation-4: -When xylem and phloem within a vascular bundle are arranged in an alternate manner on different radii, the arrangement is called radial such as in roots. In conjoint type of vascular bundles, the xylem and phloem are situated at the same radius of vascular bundles. Such vascular bundles are common in stems and leaves.