. In Bougainvillea thorns are the modifications of

Best Answer

Explanation :- 

• Leaves are modified into spines to reduce the loss of water and also these spines act as defense systems. 
• Bougainvillea do not bear spines as their leaves are not modified.
• Stipules are leaf-like outgrowth developed on both sides of the petiole. 
• In some plants, stipules are modified into spines.
• Adventitious roots provide mechanical support and help in the storage of food.
• In bougainvillea, tap root system is present. 
• In bougainvillea, thorns are small, sharp and pointed modification of axillary buds of the stem.

Final answer :-

The correct answer is stem, i.e option (D).