A scientist removed some cells from the growing point of a plant and placed it in a suitable medium leading to the formation of a shapeless lump of mass X,Y is then transferred to another medium which stimulates it to develop roots. When X which developed roots is placed in a yet another medium, then it develops shoots to from tiny plantlets. These plantlets can then be transplanted in pots or soil where they can grow to form mature plants.
(a) What is the shapeless lump of mass X known as ?
(b) What name is given to this method of producing new plants ?
(c) The growth medium used in this method contains plant nutrients in the form of jelly . Name this jelly.
(d) What is the general name of chemicals used to stimulate the growth of plant cells and development of roots and shoots?
(e) Name any two plants which are produced by this method.
(f) State any two advantage of this method of producing plants
(g) What is the other name of this method [other than that given in (b) above ?

Answer

(a) Callus (b) Tissues culture (c) Agar (d) Plant hormones (e) Dahlia and Caration (f) See page 139 (g) Micropropagation