[Campbell Biology P.778] According to the text, what is the key derived character of lobe-fi... | Practice Question

According to the text, what is the key derived character of lobe-finned fishes?

  • A: The presence of a swim bladder for buoyancy.
  • B: Rod-shaped bones surrounded by a thick layer of muscle in their pectoral and pelvic fins.
  • C: Highly flexible bodies allowing for complex movements.
  • D: The ability to gulp air into lungs connected to their pharynx.

Explanation

The text explicitly states: 'The key derived character of lobe-fins is the presence of rod-shaped bones surrounded by a thick layer of muscle in their pectoral and pelvic fins.'