Question

Prickles of rose and stem branches are

• A. Modified leaves
• B. Modified stipules
• C. Exogenous in origin
• D. Endogenous in origin

Answer 1

The correct option is C Exogenous in origin

Prickles of rose and stem branches are exogenous in origin. Thorns, spines, prickles are hard structures with sharp ends. Prickles helps in protecting the plant from the herbivorous animal. Thorns are derived from shoots, spines are derived from leaves and prickles are derived from the epidermis. They are extensions of the cortex and epidermis thus, they are exogenous in origin.
Thus, the correct answer is option C.