A thickened undergound stem X of a plant which is swollen with storred food has a number of points Y on its surface. When the old steam X is planted in the soil of a filed in the next growing seaosn, then each point Y present on its surface grows into a new plant.
(a) What is the general name of the undergound stems like X?
(b) Give one example of X
(c) What are points Y present on X known as ? ltbr gt (d) Is it necessary to plant the whole of stem X in the ground to it new plants? Explain your answer
(e) What is he name of this method of reprocuction of plants ?
(f) What is the advantage of growing new plants from the underground stems like X?
