Question

Which of the following hormone is responsible for apical dominance in plants?

• A. Abscisic acid (ABA)
• B. Gibberellic acid
• C. Indole-3-acetic acid (IAA)
• D. All Of These

Answer 1

The correct option is C

Indole-3-acetic acid (IAA)

The correct option is option C.

Explanation of correct option:

1. It is the most common plant hormone in the auxin class.
2. It is responsible for plant growth and development.
3. It regulates processes like cell differentiation, cell development, fruit development, etc.
4. It is responsible for apical dominance.

Explanation of incorrect options:

Option A:

Abscisic acid is the stress hormone, i.e., it is involved in the closure of stomata, leaf fall, etc.

Option B:

Gibberellic acid is involved in cell division, shoot elongation, etc.

Final answer: Indole-3-acetic acid (IAA) is responsible for apical dominance in plants.