Which of the following are not the examples of natural auxi…

Biology Plant Growth and Development Skill Builder Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 13, 2026

Which of the following are not the examples of natural auxins?

Indole-3-acetic acid
and , ,

Indole butyric acid
and and

Naphthalene acetic acid
and

2, 4-dichlorophenoxyacetic acid Choose the correct answer from the options given below:

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The correct answer is:

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• Indole-3-acetic acid (IAA) and Indole butyric acid (IBA) are both naturally occurring auxins found in plants. They are involved in various growth processes such as cell elongation, bud formation, and root initiation.

• Naphthalene acetic acid (NAA) and 2, 4-dichlorophenoxyacetic acid (2, 4-D) are synthetic auxins, manufactured for use in agricultural practices such as weed control.

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