Question

Match List I(Type of Tissues/structures) with List II(Characteristic features of the tissue) and select the correct answer using the codes given the lists.

List-I	List-II
a. Hydathodes	$1$. Balloon-like protrusions into treachery element, developed from Xylem Parenchyma
b. Collenchyma	$2$. Mechanical tissue that consists of living cells, walls rich in pectin and hemicelluloses
c. Periblem	$3$. Occur on leaf tips responsible for guttation
d. Tyloses	$4$. Meristematic tissue responsible for the development of cortex

• A. A-$2$, B-$3$, C-$4$, D-$1$
• B. A-$3$, B-$2$, C-$1$, D-$4$
• C. A-$2$, B-$3$, C-$1$, D-$4$
• D. A-$3$, B-$2$, C-$4$, D-$1$

Answer 1

The correct option is D A-$3$, B-$2$, C-$4$, D-$1$

The correct answer is D.

• Hydathodes are specialized pores particularly present on the leaf margins, which exudes or secretes drops of water. The process of guttation is facilitated by the hydathodes.
• Collenchyma tissue is composed by elongated living cells of uneven primary thick walls, which possess hemicellulose, cellulose, and pectic materials. It provides support, structure, mechanical strength, and flexibility to the petiole, leaf veins, and stem of young plants, allowing for easy bending without breakage.
• The periblem or middle layer gives rise to the cortex and the endodermis (compact living cells with hydrophobic substances) which is the innermost layer of the cortex.
• Tyloses are outgrowths on parenchyma cells of xylem vessels of secondary heartwood. When the plant is stressed by drought or infection, tyloses will fall from the sides of the cells and "dam" up the vascular tissue to prevent further damage to the plant.