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WAEC Biology 2025 Question 35

Question 35

Plant Responses and Hormones

The naturally produced auxin in plants is

  1. A.indole acetic acid.
  2. B.dichlorophenoxyacetic acid
  3. C.aldone
  4. D.florigen.
Show the answer and explanation

Answer: A (indole acetic acid.)

Explanation

Indole acetic acid (IAA) is the natural auxin; 2,4-D (dichlorophenoxyacetic acid) is a man-made one.