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WAEC Biology 2006 Question 37

Question 37

Respiration

Siphons and gills are structures in aquatic organisms used for

  1. A.gaseous exchange
  2. B.bouyancy
  3. C.excretion
  4. D.movement
Show the answer and explanation

Answer: A (gaseous exchange)

Explanation

Water is drawn in through siphons and passes over the gills, where oxygen is taken in and carbon dioxide given out.