Question

Vascular cambium is a meristematic layer that cuts of

• A. Primary xylem and primary phloem
• B. Xylem vessels and xylem tracheids
• C. Primary xylem and secondary xylem
• D. Secondary xylem and secondary phloem

Answer 1

The correct option is D Secondary xylem and secondary phloem

Inter and intrafascicular cambiums join to form a complete ring of cambium called as vascular cambium, which initiates intrastellar secondary growth. The vascular cambial cells are the meristematic cells that continuously divide into daughter cells. The daughter cells produced inward towards pith mature into secondary xylem elements, while those produced outward toward cortex differentiate into secondary phloem elements.

Thus, the correct answer is option D.