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6. The basking shark swims with its mouth open, is this free of problems?
7. Lungfish have a modified swim bladder that does what?
- Absorbs oxygen and removes waste
- Removes oxygen and removes waste
8. Chondrichthyes are
- Jawed fish
- Both
- Fish with cartilaginous skeletons
9. Which fins are paired?
- Caudal
- Pectoral and pelvic
- Pectoral
- Anal and caudal
- Anal
- Pelvic
10. What were modified to form jaws (which at first had no teeth)?
- Anterior gill arches
- Bones
- Pharyngeal slits
11. A bony skeleton is less or more effective at serving as an attachment point for muscles?
12. Do fins contain a lot of muscle?
13. Sharks and Rays belong to what class?
- Chondrichthyes
- Cartilaginous
- Chordata
14. Jaws with no teeth were used in buccal pump to increase
- Consumption
- Water flow across gills
- Signalling and communication
15. Is bone better at transmitting muscular force than cartilage?
16. Coelacanths and lungfish are types of what?
- Jawless fish
- Shark
- Lobe-finned fish
- Ray
17. Lungfish will drown when kept underwater and not allowed to breath air
18. In the evolution of bony skeletons, cartilage is replaced by
- Calcified rigid bone
- Bone marrow
19. How many known species of Actinopterygii are there?
- 62,000
- 32,000
- 52,000
- 42,000
20. Who were the first fishes to have jaws?
- Placoderms
- Eels
- Rays
- Hagfish