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JAMB Biology 1985 Question 9

Question 9

Reproduction in Animals

At what stage in the life history of a toad is its mode of breathing similar to that of a fish?

  1. A.Tadpole stage
  2. B.External gill stage
  3. C.Adult stage
  4. D.Internal gill stage
  5. E.Larval stage.
Show the answer and explanation

Answer: D (Internal gill stage)

Explanation

Fish breathe with internal gills covered by an operculum. The older tadpole has internal gills covered by a fold of skin and pumps water over them in the same way.