NEET Biology question

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

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

Answer: (A)

Solution

As the vascular cambium becomes active, cells cut off towards the pith mature into secondary xylem while cells cut off towards the periphery mature into secondary phloem. The primary and secondary phloem get gradually crushed due to

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Question ID VK-105800