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6. The basking shark swims with its mouth open, is this free of problems?

  • No
  • Yes

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?

  • More
  • Less

12. Do fins contain a lot of muscle?

  • No
  • Yes

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?

  • Yes
  • No

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

  • True
  • False

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