Advertisements
Advertisements
Question
What is the fate of primary xylem in a dicot root showing extensive secondary growth?
Options
It is retained in the centre of the axis.
It gets crushed.
May or may not get crushed.
It gets surrounded by primary phloem.
MCQ
Solution
It is retained in the centre of the axis.
Explanation:
The cambial ring becomes active and starts cutting off new cells from both the inner and outer sides. The cells that are cut off near the pith and mature into secondary phloem are gradually squashed as secondary xylem continues to form and accumulate. The primary xylem, on the other hand, stays mostly intact at or near the centre.
shaalaa.com
Secondary Growth - Secondary Growth in Roots
Is there an error in this question or solution?
