Question

Vascular cambium forms xylem on the inner side and phloem on the outer side due to

• A. Effect of gravity
• B. Shearing force of wind
• C. Intra-fascicular nature
• D. Differential action of hormones

Answer 1

The correct option is D Differential action of hormones

The vascular cambium produces the vascular elements on both the sides but the differentiation of those vascular elements into xylem and phloem is under the control of plant hormones. The hormones will promote differentiation into phloem on the outer side whereas on the inner side they will stimulate the differentiation into the xylem.
So, the correct answer is option D.