Which one of the following was not an adaptation seen in the sharks (Chondrichthyes)?

Question

Quizplus · Accepted Answer

Sharks (Chondrichthyes) do not have a swim bladder, which is a common adaptation in bony fish to control buoyancy. Instead, sharks rely on their large oily liver and flexible cartilaginous skeleton to control their depth in the water. The other adaptations listed (lateral line system, internal fertilization and development, teeth, and calcified cartilaginous skeleton) are all characteristics of sharks.

Which One of the Following Was Not an Adaptation Seen