Question

Increase in girth (diameter).of plant as a result of the activities of lateral meristems is called _______________.

• A. primary growth
• B. secondary growth
• C. open form of growth
• D. diffuse growth.

Answer 1

The correct option is B secondary growth

The increase in girth or the diameter of the stem/root is called secondary growth. In dicot stem lateral or vascular cambium is responsible for secondary growth. These cambial strips are present in between xylem and phloem, forming a vascular bundle that is conjoint, colateral and open. The cambial strips of the vascular bundle add secondary xylem and phloem on either sides.

So, the correct answer is 'secondary growth'