In Opuntia the spines are modification of
Leaf
Branch
Epidermis
Flower
Heterophylly has
The leaf parts gets modified into spines in order to
Example of leaf for climbing.
How many plants among China rose, Ocimum, sunflower, mustard, Alstonia, guava, Calotropis and Nerium (oleander) have opposite phyllotaxy?
Which part of leaf shows venation