WAEC Biology 1997 Question 16

Question 16

Plant Responses and Hormones

A high concentration of auxin in the root will

  1. A.inhibit growth
  2. B.stimulate growth
  3. C.not affect growth
  4. D.cause the root to rot
  5. E.reduce water absorption
Show the answer and explanation

Answer: A (inhibit growth)

Explanation

Roots are very sensitive to auxin: a concentration that makes shoots grow actually slows root growth.