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WAEC Biology 2015 Question 16

Question 16

Plant Responses and Hormones

A farmer who wants to keep seeds for three years before planting and wants to prevent them from sprouting uses

  1. A.auxin.
  2. B.gibberellins.
  3. C.abscisin.
  4. D.cytokinins.
Show the answer and explanation

Answer: C (abscisin.)

Explanation

Abscisic acid (abscisin) is a growth inhibitor that keeps seeds dormant. Auxins, gibberellins and cytokinins all promote growth or germination.