First slide

Anatomy of Dicotyledonous and Monocotyledonous Plants

Question

Read the following statements with respect to dicot stem and select the correct option
(A) Epidermis is covered with in a layer of cuticle, may bear trichomes and few stomata.
(B) Ring arrangement of conjoint, collateral, and open vascular bundles
(C) Presence of semilunar patches of sclerenchyma above the phloem
(D) Hypodermis of dicot stem is sclerenchymatous

Easy

A

Only(A),(B) are correct.
B

(B),(C),(D) are correct.
C

(A),(B),(C) and (D) are correct.
D

Only (D) is incorrect.

Solution

The epidermis of dicot stem is covered with a thin layer of cuticle, it may bear trichomes and a few stomata.
Pericycle is present on the inner side of the endodermis and above the phloem in the form of semi-lunar patches of sclerenchyma.
A large number of vascular bundles are arranged in a ring ; the ‘ring’ arrangement of vascular bundles is a characteristic of dicot stem. Each vascular bundle is conjoint, open, and with endarch protoxylem.
Hypodermis in dicot stem consists of a few layers of collenchymatous cells just below the epidermis.

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