Question

Intrafascicular cambium is situated in
A. In between the vascular bundle
B. Inside the vascular bundle
C. Outside the vascular bundle
D. In pith

Answer 1

Hint: Intrafascicular cambium is a primary meristem as it is derived from embryonic meristems and it is present in the plant from the very beginning of its lifecycle.

Complete answer:
Intrafascicular cambium is situated inside the vascular bundle. It produces primary xylem on the inner side and primary phloem on the outer side.

Additional information:
- A cambium (plural cambia), in plants is a type of tissue with undifferentiated cells that help in plant growth.
- The cells of cambium have the ability to divide and differentiate as any type of cell.
- Intrafascicular cambium is present in the vascular bundles of dicot stems.
- It is present in between xylem and phloem of the plant.
- Later during secondary growth, it gets transformed into secondary meristem and forms interfascicular cambium.

Note: The interfascicular cambium is present between the vascular bundle. The intrafascicular and interfascicular cambia join up to form a ring (in three dimensions, a tube) during secondary growth which separates the primary xylem and primary phloem. The vascular cambium produces secondary xylem on the inside of the ring, and secondary phloem on the outside, pushing the primary xylem and phloem apart.