Question

multiple choice question
what characteristic do bony fishes and cartilaginous fishes share?
o skeleton made of bone
o swim bladder
o hinged gill covering
o a lateral line system

Explanation:

• Bony fishes have a skeleton made of bone, while cartilaginous fishes have a skeleton made of cartilage. So "skeleton made of bone" is incorrect.
• Bony fishes have a swim bladder, but cartilaginous fishes do not. So "swim bladder" is incorrect.
• Bony fishes have a hinged gill covering (operculum), while cartilaginous fishes do not. So "hinged gill covering" is incorrect.
• Both bony fishes and cartilaginous fishes have a lateral line system, which is used to detect vibrations and movements in the water.

Answer:

a lateral line system