Question

The interfascicular cambium develops from _____.
A. Cortical cells
B. Endodermis
C. Pericycle
D. Medullary rays

Answer 1

Hint:
The cambium is a tissue layer that provides partially undifferentiated cells for the growth of the plant. It is present in the area between the xylem and the phloem. It comprises parallel rows of cells, which result in secondary tissues. The cambium between the primary phloem and the primary xylem is called the intrafascicular cambium.

Complete step by step answer:
The primary meristem comprises intrafascicular, interfascicular, and cork cambium. The intrafascicular cambium lies in the vascular bundles of dicot stems. This primary meristem is derived from embryonic meristems. It is present in the plant from the beginning, so it is primary in origin. The intrafascicular cambium makes the primary xylem on the inner side and the primary phloem on the outer side.
During secondary growth, medullary ray cells of the line between adjacent vascular bundles become meristematic and form a new interfascicular cambium. The fascicular and interfascicular cambium together forms the cambium ring separating the primary xylem and the primary phloem.
Cortical tissues are the tissue of unspecialized cells fibbing between the epidermis and the vascular tissues of stems and roots. The endodermis is the innermost layer of the cortex and acts as a boundary between the stele and the cortex. The pericycle is a primary tissue of roots and is the location for the initiation of two secondary meristems, lateral roots, and the vascular and cork cambium.

Option ‘D’ is correct

Note:
Secondary growth of plants happens after the first season and increases the circumference and thickness of the plants. It is because of the action of the two lateral meristems, the vascular cambium and cork cambium.