Question

Numerous vascular bundles occur scattered in the ground tissue of
A) Monocot stem
B) Monocot root
C) Dicot stem
D) Dicot root

Answer 1

Monocot root is the fibrous root. It has many small fibers structures arriving from it. They form a wide network. They arise from the base of the stem. The dicot root is the taproot and it has one main root structure from which small fibers arise. In dicot root, the number of xylem and phloem vessels are few that 2-5 in number whereas, in the monocot root the number of the xylem and phloem vessels include more than 8. They are present in large numbers in the monocot root.

Complete answer:
The monocot stem has the vascular bundles large in number. They are present in the scattered form. The dicot root has the vascular bundles aligned in a ring. They are surrounded by the parenchyma cells in a pith region. In the monocot stem, the vascular bundles are arranged into xylem and phloem cells which are present in a scattered form throughout the ground tissue.

Additional information:

Dicot stem	Monocot stem
Ground tissue is differentiated into stelar and extra stelar.	Ground tissue is not differentiated.
Vascular bundles are less in number.	Vascular bundles are abundant in number.
The pericycle is present.	The pericycle is absent.
Pith is present.	Pith is absent.

Hence, the correct answer is option ‘B’ i.e, ‘monocot root’.

Note: To distinguish between the monocot and the dicot root one must observe the vascular bundles. The one with the scattered vascular bundles is the monocot stem and the one with the radially present and less in number is the dicot stem sample. In both, the types of stem cuticles are present along with a single layer of the epidermis.