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JAMB Biology 1979 Question 38

Question 38

Reproduction in Plants

The maize grain is regarded as a fruit and not a seed because

  1. A.it is covered by a sheath of leaves
  2. B.the testa and fruit wall fuse after fertilization
  3. C.it has both endosperm and cotyledon
  4. D.it has coleorhiza and coleoptile
  5. E.the pericarp and seed coat are separate.
Show the answer and explanation

Answer: B (the testa and fruit wall fuse after fertilization)

Explanation

A maize grain is a caryopsis: the fruit wall (pericarp) is fused with the seed coat, so the whole grain is a fruit.