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WAEC Biology 2018 Question 12

Question 12

Excretion

Which of the following substances is not an excretory product of animals?

  1. A.Carbon dioxide
  2. B.Urea
  3. C.Sweat
  4. D.Oxygen
Show the answer and explanation

Answer: D (Oxygen)

Explanation

Animals take in oxygen for respiration; they do not produce it as a waste. Carbon dioxide, urea and sweat are all excreted.