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JAMB Biology 1990 Question 3

Question 3

Animal Nutrition

Hydra removes undigested food by

  1. A.passing it through the anus
  2. B.passing it through the mouth
  3. C.means of a contractile vacuole
  4. D.egesting it through the body surface
Show the answer and explanation

Answer: B (passing it through the mouth)

Explanation

Hydra's gut has only one opening, so undigested food goes out through the mouth.