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WAEC Biology 2023 Question 6

Question 6

Animal Kingdom

Study the list of organisms: I - Hydra, II - Owl, III - Snake, IV - Snail. Arrangement of the organisms in order of increasing complexity is

  1. A.I-II-III-IV.
  2. B.II-III-I-IV.
  3. C.I-IV-III-II.
  4. D.IV-III-II-I.
Show the answer and explanation

Answer: C (I-IV-III-II.)

Explanation

Hydra (a coelenterate) is simplest, then the snail (mollusc), then the snake (reptile), and the owl (bird) is the most complex.