Which one of the plant growth regulators would you use if you are asked to
(a) Induce rooting in a twig, (b) Quickly ripen a fruit. ( c) Delay leaf senescence , (d) Induce growth in axillary buds, (e) 'Bolt' a rosette plant, (f) Induce immediate stomatal closure in leaves, (g) Overcome apical dominance , h) Kill dicotyledonous weeds.

Fill in the blanks with appropriate word/words. a) The phase in which growth is most rapid is................ b) Apical dominance as expressed in dicotyledonous plants is due to the presence of more...............in the apical bud than in the lateral ones. c). In addition to Auxin, a...............must be supplied to the culture medium to obtain a good callus in plant tissue culture. d)...............of vegetative plants are the sites of photoperiodic perception.