Question

Question 9 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.

Class XI Biology Chapter - Plant Growth and Development Page 254

Answer 1

(a) Induce rooting in a twig – Auxins

(b) Quickly ripen a fruit – Ethylene

(c) Delay leaf senescence – Cytokinins

(d) Induce growth in axillary buds – Cytokinins

(e) ‘Bolt’ a rosette plant – Gibberellic acid

(f) Induce immediate stomatal closure in leaves – Abscisic acid



hope its helps

Answer 2

Hey there,

(a)Auxin helps in root initiation. So, when talked about Inducing rooting in a twig it will be Auxin.

(b)Ethylene is a gas that helps in ripening of the fruit.

(c)The hormone called Cytokinin helps in delaying of the senescene in leaves.

(d) Cytokinin helps in Inducing growth in axillary buds

(e)Bolting effect is promoted by Gibberlins as in rosette plants.

(f)Absesic acid is a Growth Inhibitor. It functions in Inducing immediate stomatal closure in leaves.

Thanks!