Question

Apical dominance is not affected by

• A. Indole acetic acid
• B. Gibberellin
• C. Indoleacetaldehyde
• D. Indole-3-butyric acid

Answer 1

The correct option is B Gibberellin

Apical dominance is a physiological response of auxins. The chemicals mentioned in options A, C and D are all auxins. They inhibit the growth of axillary buds and stimulate the growth of apical bud. This phenomenon is called as apical dominance. Gibberellins are also growth promoting phytohormones. They stimulate internodal elongation. Thus, bringing about an increase in length or height of plants.

Thus, the correct answer is option B.