Question
Biology Question on plant growth and development
Apical dominance in plants is caused by
A
high concentration of auxins in the terminal bud.
B
high concentration of gibberellins in the apical bud
C
high concentration of auxins in the lateral bud
D
absence of auxins and gibberellins in apical bud.
Answer
high concentration of auxins in the terminal bud.
Explanation
Solution
Apical dominance is the phenomenon in which main axis or terminal bud continuous to grow suppressing the growth of lateral bud. High concentration of auxin in the terminal bud promotes its growth and it increases ethylene formation in lateral bud which suppresses its growth.