Question

The flexibility in plants is due to ______(1) ________tissue, which is found in leaf stalks below the epidermis. Here (1) is depicted by

A) C and D
B) Only B
C) A and B
D) B and C

Answer 1

Hint:The ground tissue of plants includes- parenchyma, collenchyma and sclerenchyma. Parenchyma acts as filler tissue in the soft parts of the plant. Sclerenchyma provides structural support to a plant.

Complete answer:
To get the answer for the above question let us know about collenchyma
>The collenchyma cells have thin primary walls having some areas of secondary thickening.
>It provides extra mechanical and structural support.
>Collenchyma is found below the epidermis.
>Collenchymas tissue is usually present in stem and leaf stalks.
>The cells of collenchyma have thick deposits of cellulose and they appear polygonal.
>The collenchyma protects the plants by acting as an inner framework just like bones do for humans and animals.
>The collenchyma provides support, structure, mechanical strength and flexibility to the petiole, leaf veins, stem of young plants allowing them to bend easily without breakage.
>The collenchyma may or may not contain chloroplast.
>The cell wall is composed of pectin, cellulose and hemicelluloses.
>The collenchymas tissue is elastic which gives flexibility to stem.
>Collenchymas tissue has living protoplast, thickened cell walls and axially elongated cells.

So the correct answer is only B because B is collenchyma.

Note:Collenchyma tissue prevents contravention of stem against wind and other environmental factors. It also improves the tensile strength of the plant body. Based on cell wall thickening the collenchymas tissue is classified into angular collenchymas which is polygonal in shape. Annular collenchyma has circular shaped cells. Lamellar collenchyma has longitudinally elongated cells and lacunar collenchyma has spherical cells.