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WAEC Biology 2013 Question 13

Question 13

Respiration

Which of the following organs are used for gaseous exchange in a mature toad?

  1. A.Gills, lungs and eardrum.
  2. B.Lungs, mouth and eardrum.
  3. C.Mouth, skin and gills.
  4. D.Skin, lungs and mouth.
Show the answer and explanation

Answer: D (Skin, lungs and mouth.)

Explanation

An adult toad has no gills; it exchanges gases through its moist skin, the lining of its mouth and its lungs.