Plant Growth and Development Question 25

25. The pineapple which under natural conditions is difficult to blossom has been made to produce fruits throughout the year by application of

[NEET Kar. 2013]

(a) IAA, IBA

(b) NAA, 2, 4-D

(c) Phenyl acetic acid

(d) Cytokinin

Show Answer

Answer : b

Hints & Solutions

(b) Plants which are difficult to flower can be made to do so by spraying them with 2,4 , -D (2,4 - dichlorophenoxy acetic acid) and NAA (napthalene acetic acid) which are synthetic auxins, e.g., litchi, pineapple.