1. Sharks have a swim bladder
1 of 20
Other questions in this quiz
2. Sharks and Rays belong to what class?
3. The basking shark swims with its mouth open, is this free of problems?
4. Lungfish have a modified swim bladder that does what?
- Absorbs oxygen and removes waste
- Removes oxygen and removes waste
5. Why do Chondrichthyes have a poor fossil record?
- Their bodies were often eaten
- Skeletons are made of cartilage
- They were very rare