Name the plant hormones which are responsible for the following effects:

(a) falling of leaves


(b) opening of stomata


(c) bending of stem towards light


(d) closing of stomata

(a) Abscisic acid is responsible for abscission of falling of leaves.

(b) Cytokinin is responsible for opening of stomata.


(c) Auxin is responsible for bending of stem towards light.


(d) Abscisic acid is responsible for closing of stomata.


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