Question

Match List I with List II : \begin{center} \begin{tabular}{ll} List I & List II
A. Conjunctive tissue & I. Specialised cells in the vicinity of guard cells
B. Casparian strips & II. Endodermal cells rich in starch
C. Subsidiary cells & III. Tissue between xylem and phloem
D. Starch sheath & IV. Endodermal cells with suberin deposition
\end{tabular} \end{center} Choose the correct answer from the options given below :

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

Hint:

Casparian strips = Control of water (Suberin). The starch sheath is just another name for the endodermis but specifically in the stem.

Answer 1

The Correct Option is A

This question relates to the internal anatomy of flowering plants. Understanding the specific terminology for cell layers and tissues is essential for identifying plant organs (root vs. stem):
• Conjunctive tissue (A): In dicot roots, the parenchymatous cells located in the Tissue between xylem and phloem (III) patches are called conjunctive tissue.
• Casparian strips (B): These are characteristic of the endodermis in roots. They consist of Endodermal cells with suberin deposition (IV) in the form of water-impermeable waxy material, which forces water to enter the vascular cylinder through the cell cytoplasm.
• Subsidiary cells (C): These are Specialised cells in the vicinity of guard cells (I) in the epidermis. They are modified epidermal cells that assist in the movement and regulation of stomatal opening.
• Starch sheath (D): In the dicot stem, the endodermis is often referred to as the starch sheath because its Endodermal cells are rich in starch (II) grains.