(a) This method of propagating plants or trees is known as grafting.
(b) The segregated stem of tree X is termed as stock.
(c) The segregated stem of tree Y that is devoid of roots, is termed as scion.
(d) The layer Z is called the cambium layer.
(e) The cambium layer (Z) of both the stems should be joined, as they are responsible for the growth of a new tree.
(f) Four trees which are propagated by this method are apple, pineapple, orange and grapes.
(g) The main advantage of cultivating plants by this method is that the graft will have the most desirable features of both the parts, i.e. the stock and the scion.