Multiple choice

Which of the following is a synthetic plant hormone?

  1. IAA

  2. 2, 4 - D

  3. GA

  4. Zeatin
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

2,4-D (2,4-dichlorophenoxyacetic acid) is a synthetic auxin widely used as a herbicide and plant growth regulator. IAA is natural auxin, GA represents gibberellins, and Zeatin is a natural cytokinin produced in plants.

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