Question

In dicot stem, the secondary growth takes place by

• A. Primary cambium
• B. Secondary cambium
• C. Development of cambium in stele region
• D. Development of cambium in stele and in the cortical region

Answer 1

Answer: (D)

Development of cambium in stele and in the cortical region

The increase in lateral thickening is called secondary thickening or secondary growth. At the initial stage of secondary growth, cambium forms a ring-like structure known as cambium ring. This ring is present in stellar and cortical region both. This development or secondary growth takes place in stele (intrastelar secondary growth) and also in the cortex (extra stellar secondary growth).

So, the correct answer is 'Development of cambium in stele and in the cortical region'