Question

Angular collenchyma occurs in
A. Salvia
B. Helianthus
C. Althaea
D. Cucurbita

Answer 1

Hint:
Collenchyma is one of the simple tissues found in plants. Angular collenchyma is present in the genus of plants that comprise of herbaceous vines. The plants belonging to this genus are found in tropical and temperate areas. They are used worldwide for their fruit.

Complete answer:
Angular collenchyma occurs in Cucurbita.
Collenchyma is a type of plant tissue in which the primary walls are thickened in an uneven manner and consists of homogenous, elongated cells. It provides mechanical support to the plant.
Angular collenchyma is a type of collenchyma in which the material that causes thickening is deposited at angles or corners of the cell. This type of collenchyma is found in members of the genus Cucurbita. Pumpkin, melon, zucchini are examples of fruits that belong to this genus.

The correct answer is option (D) Cucurbita.

Additional information:
Different types of collenchyma can be found in plants:
Lamellar: In this type of collenchyma, the thickening material is deposited on the tangential walls of the cells.
Lacunar: This is the type of collenchyma in which the thickening material is deposited in those areas of the cell wall that are in direct contact with intercellular spaces.
Annular: In this collenchyma, the cell lumen seems to be circular in shape. There are heavy deposits of pectin and hemicellulose in the cell walls.
Angular: As mentioned before, the thickening material in this collenchyma is deposited at angles or corners of the cell.

Note: Collenchyma is a tissue that comes under the group of fundamental tissues in plants. This group comprises collenchyma, parenchyma, and sclerenchyma. Collenchyma and sclerenchyma have thick walls, whereas the walls of parenchyma are thin.