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JAMB Biology 1994 Question 9

Question 9

Animal Kingdom

Which of the following combinations differentiates a bony fish from a cartilaginous fish? I. Presence of gills II. Absence of gill slits III. Possession of bony skeleton IV. Possession of laterally compressed body V. Possession of dorso-ventrally compressed body

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

Answer: C (II, III and IV)

Explanation

Bony fish have their gills covered by an operculum (no visible gill slits), a skeleton of bone and a body flattened from side to side. Cartilaginous fish such as rays are flattened top to bottom.