Question

Match column-I and column-II and select the correct option accordingly:

Column I	Column II
A. Stele	i. Inner most layer of cortex
B. Endodermis	ii. Suberin
C. Casparian strips	iii. The tissue external to vascular cambium
D. Bark	iv. The tissue inner to endodermis

• A. A-IV, B-I, C-II, D-III
• B. A-III, B-II, C-I, D-IV
• C. A-I, B-II, C-III, D-IV
• D. A-IV, B-II, C-I, D-III

Answer 1

The correct option is A A-IV, B-I, C-II, D-III

A) Stele: It is the central core of the stem and root of a vascular plant, Stele consists of pericycle, vascular bundles and medulla/pith.
B) Endodermis: It is the innermost layer of cortex in both root and stem, surrounding a vascular bundle.
C) Casparian strips: They are the suberised thickenings present in the radial and transverse wall of the endodermal cell.
D) Bark: It is the outermost layers of stems and roots of woody plants exterior to the vascular cambium. It includes the periderm, the primary cortex, pericycle and phloem.