Question

Which of the following is incorrect about secondary growth in dicot stem?

• A. Girth of stem increases
• B. Interfascicular cambium and intrafascicular cambium, both show division
• C. Secondary xylem is cut off more in quantity towards outer side
• D. None

Answer 1

Answer: (C)

Secondary xylem is cut off more in quantity towards outer side

As the result of Secondary growth in dicot stem, girth of the stem will increase, both Intrafascicular and Interfascicular cambium will show division.

But as in a vascular bundle, xylem lies towards the pith and phloem lies towards the periphery, the cell cut off by cambial ring towards pith mature into the secondary xylem and the cells cut off towards periphery mature into secondary phloem.

So, the correct option is 'Secondary xylem is cut off more in quantity towards outer side'