Question

A secondary growth proceeds, in a dicot stem, the thickness of

• A. sapwood increases
• B. heartwood increases
• C. both sapwood and heartwood increases
• D. both sapwood and heartwood remains the same

Answer 1

The correct option is B heartwood increases

Increase in thickness or volume of stem due to the formation of secondary tissues is called Secondary growth. It occurs in dicotyledons and gymnosperms.

During secondary growth, the thickness of heartwood increases, because every sap wood gradually converted into the heartwood.

So, the correct option is ‘heartwood increases’.