Q902
. . . . . . . . plant hormone prevents the mechanism of apical dominance in plants.
A.
Cytokinin
AnswerB.
Gibberellin
C.
ABA
D.
Auxin
Answer: Option A
Solution
Answer: Option A
Solution:
Cytokinin is the plant hormone that prevents the mechanism of apical dominance in plants.Cytokinins promote cell division and increase cell expansion during the proliferation and expansion stages of leaf cell development, respectively. During leaf senescence, cytokinins reduce sugar accumulation, increase chlorophyll synthesis, and prolong the leaf photosynthetic period.