Question

Plant hormones are organic compounds influencing growth and development. One of the hormones was first isolated from human urine and other is a gaseous hormone. 

(a) Name the two hormones. 

(b) Write any two functions of these hormones.

Answer 1

(a) Auxin and Ethylene

(b) Auxin : Initiate rooting in the stem cuttings 

: promotes flowering in pineapple

Ethylene : Promote rapid internode elongation in deep water rice plants

: Promotes the development of female flower in cucumber and increase the yield