Question
Biology Question on Plant Growth Regulators
Apical dominance is caused by
A
auxin
B
gibberellin
C
kinetin
D
ABA
Answer
auxin
Explanation
Solution
In many plants, as the apical bud grows, the growth of lower axillary buds is suppressed. Removal of apical bud results in the growth of lower buds. The auxin (IAA) of the terminal bud inhibits the growth of lateral buds. This phenomenon is known as apical dominance.