Question

Vascular cambium forms

• A. Secondary xylem and secondary phloem
• B. Primary xylem and primary phloem
• C. Only secondary phloem
• D. Only primary xylem

Answer 1

The correct option is A Secondary xylem and secondary phloem

The vascular cambium is located between the xylem and the phloem in the stem and root of a vascular plant, and is the source of both the secondary xylem growth (inwards, towards the pith) and the secondary phloem growth (outwards). It is a cylinder of unspecialized meristem cells that divide to give new cells, which then specialize to form secondary vascular tissues. Vascular cambium are found in dicots and gymnosperms but not monocots, which usually lack secondary growth

So, the correct answer is 'Secondary xylem and secondary phloem'