Underground stems of potato, ginger; turmeric, Zaminkand, Colocasia are the examples of modified stem for
Conduction of minerals
Conduction of water
Both $(a)$ and $(b)$
Storage of food
What is stem ? Describe parts of stem and normal functions.
Expanded green stem of Opuntia is called
In which of the following plants, stem perform the function of storage and act as organ of perennation