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JAMB Biology 1983 Question 28

Question 28

Reproduction in Animals

In what order do the following structures develop during the metamorphosis of the toad? 1 External gills 2. Internal gills 3. Forelimbs 4. Hindlimbs 5. Mouth

  1. A.1 2 3 4 5
  2. B.1 5 2 4 3
  3. C.2 1 3 4 5
  4. D.5 3 4 1 2
  5. E.5 4 3 2 1.
Show the answer and explanation

Answer: B (1 5 2 4 3)

Explanation

The tadpole first has external gills, then its mouth opens, then internal gills form. The hindlimbs appear before the forelimbs.