question_answer 14)

  The affect of apical dominance can be overcome by which of the following hormone? (a) IAA                                  (b) Ethylene                       (c) Gibberellin                   (d) Cytokinin                     

Answer:

                (d) Cytokinin is antagonistic to the action of auxin and thus overcome the phenomenon of apical dominance. Whereas, IAA, helps in apical dominance, ethylene in ripening of fruits and gibberellin in overcoming bud and seed dormancy.