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JAMB Biology 2007 Question 32

Question 32

Respiration

Which of the following uses diffusion as the principal method of gaseous exchange?

  1. A.Lizard.
  2. B.Grasshopper.
  3. C.Rat.
  4. D.Earthworm.
Show the answer and explanation

Answer: D (Earthworm.)

Explanation

The earthworm has no lungs or tracheae; oxygen simply diffuses through its thin moist skin into the blood.