Question

What is the fate of the primary xylem in a dicot root showing extensive secondary growth?

• A. It gets crushed.
• B. May or may not get crushed.
• C. It gets surrounded by primary phloem.
• D. It is retained in the centre of the axis.

Answer 1

The correct option is D

It is retained in the centre of the axis.

The primary and secondary phloem get crushed due to the continuous formation and accumulation of the secondary xylem. However, the primary xylem remains intact in the centre of the stem.