Question

Select the correct option:
Read the following statements.
(i) Multicellular epidermal hair
(ii) Collenchymatous hypodermis
(iii) Pith present
(iv) Vascular bundles present in a ring i.e., eustele
Above given features describe which of the following plant parts?
A)Monocot stem
B)Monocot root
C)Dicot stem
D)Dicot root

Answer 1

Hint: There's no area of pith in monocot roots. It will be in a decreased condition even though the pith area is present. Dicot stems have a ring structure with their vascular bundles. Near the exterior edge of the stem, monocot stems have much of their vascular bundles.

Complete answer:
The outermost layer of the dicot stem with multi-cellular epidermal stem hair is the epidermis (protection and heat loss). An area lying directly below the epidermis is the Dicot stem hypodermis. It is expressed with annular thickenings by a few layers of collenchyma cells (tissue supported by the thickening of cell walls). In dicotyledons, pith is found throughout the middle of the stem. Dicot stems have a circular pattern of vascular tissues with a pith, or medulla, which is tissue throughout the stems of vascular plants composed of soft, spongy parenchyma cells (store and distribute nutrients throughout the plant).

On the exterior of a vascular bundle, the dicot stem lacks a bundle sheath. A sclerenchymatous bundle sheath is on the exterior of a vascular bundle in the monocot stem. It closes the vascular bundles. As a consequence of secondary vascular tissues and periderm formation, Dicot stem may feature secondary growth.

Hence, the correct answer is option (C)

Note: Monocots appear to have "fibrous roots" which in several directions weave off. In comparison with dicot root structures which dig deeper and establish thicker systems, these fibrous roots occupy the upper level of the soil. One major root called the taproot is also found in Dicot roots, where other, smaller roots branch out.