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JAMB Biology 1997 Question 5

Question 5

Animal Kingdom

The cnidoblast cells found in hydra are used for

  1. A.reproduction
  2. B.offence and defence
  3. C.locomotion and nutrition
  4. D.food collection
Show the answer and explanation

Answer: B (offence and defence)

Explanation

Cnidoblasts contain stinging threads (nematocysts) that paralyse prey and drive off enemies, so they serve offence and defence.