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JAMB Biology 1993 Question 23

Question 23

Plant Responses and Hormones

The response shown by the tips of the root and shoot of a plant to the stimulus of gravity is

  1. A.haptotropism
  2. B.phototropism
  3. C.hydrotropism
  4. D.geotropism.
Show the answer and explanation

Answer: D (geotropism.)

Explanation

A growth response to gravity is geotropism: roots grow down (positive) and shoots grow up (negative).