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JAMB Biology 2004 Question 28

Question 28

Growth and Development

Epigeal germination of a seed is characterized by

  1. A.more rapid elongation of the hypocotyl than the epicotyl
  2. B.more rapid elongation of the epicotyl than the hypocotyl
  3. C.equal growth rate of both the hypocotyl and epicotyl
  4. D.lack of growth of the hypocotyl
Show the answer and explanation

Answer: A (more rapid elongation of the hypocotyl than the epicotyl)

Explanation

In epigeal germination (e.g. bean) the hypocotyl lengthens quickly and carries the cotyledons above the ground. In hypogeal germination the epicotyl grows more and the cotyledons stay below.