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JAMB Biology 2008 Question 10

Question 10

Support and Movement

Which of the following is used mainly for balancing in fish?

  1. A.The caudal fin
  2. B.The pectoral fin
  3. C.The anal fin
  4. D.The dorsal fin.
Show the answer and explanation

Answer: D (The dorsal fin.)

Explanation

The dorsal fin on the back stops the fish from rolling over and keeps it upright. The caudal fin drives it forward and the pectoral fins steer and brake.