Question

Secondary growth occurs in

• A. Cortical region
• B. Vascular region
• C. Both A and B
• D. None of the above

Answer 1

The correct option is C Both A and B

Secondary growth refers to the growth that results from cell division in the cambia or lateral meristems and that causes the stems and roots to thicken. Secondary growth occurs in most seed plants, but monocots usually lack secondary growth.

Secondary growth of cortex is the result of the activity of a secondary meristem, called as cork cambium, which appears between hypodermis and primary cortex.

The vascular cambium cell divides produces secondary phloem to outside of the dicot stem and secondary xylem inside.