Question

After two or three years of the secondary growth, the cortex in dicot root

• A. remains intact
• B. is completely sloughed away
• C. is largely lost
• D. is converted into cork

Answer 1

The correct option is C is largely lost

In dicot root the cortex is made up of thin parenchymal cells. Due to the presence of cambium the dicot roots undergo secondary growth. During the secondary growth, cambium undergoes cell division. This causes an increase in the number of secondary xylem and phloem tissues. Thus the secondary xylem and phloem tissue occupies the cortical region by crushing the cortical cells . Therefore, the cortex is largely lost in the dicot root after two or three years of secondary growth.