1. Unit #7 Quiz #5 Grade: «grade» Subject: «subject» Date: «date»

2. 1The tiger shark has which type of caudal fin: A homocercal B heterocercal C dorsal prominent D ventral prominent

3. 2All of the following are in the subclass of Elasmobrachii, EXCEPT: A sharks B rays C chimeras D skates

4. 3Using the phylogenetic following tree, which of the following true about placoid scales: A Placoid scales can be found on any species more advanced than chondrichthyes B Placoid scales can be found on any species less advanced than chondrichthyes C Placoid scales can be found on chondricthyes, but no other organisms on this chart D Placoid scales can be found on any organism that has gills

6. 4Both subclasses of chondrichthyes had their radiation event: A Cambrian B Devonian C Cretaceous D Tertiary

7. 5A shark with the following type of teeth most likely eats A large fish or mammals B small, schooling fish C clams and bivalves D krill and plankton

8. 6Scientists have discovered scales of chondrichthyes that date back to the ____________ period. A Cambrian B Silurian C Ordovician D Quaternary

9. 7Which of the following is NOT a characteristic of Chimeras A They have 6 teeth that are constantly replaced B They have 6 teeth that are permanent and used for grinding shelled inverts C They have only a single gill slit D They have fewer organs than a shark or a ray.

10. 8Many sharks must constantly move so that they can continually wash oxygenated water over their gills. These sharks have which of the following respiratory systems: A Two Pump B Ram Ventilation C Spiracles D Lobed Lungs

11. 9Chondrichthyes use which of the following to help with bouyancy. A oil-filled liver B gas bladder C swim bladder D blubber

12. 10Chondrichthyes have ______________ scales. A Placoid B Ganoid C cycloid D ctenoid

13. 11Which of the following does NOT shed many teeth in its lifetime A Tiger Shark B Manta Ray C Chimera D Great White Shark

14. 12A shark with the following type of teeth most likely eats A large fish or mammals B small, schooling fish C clams and bivalves D krill and plankton

15. 13Cladoselache was an important chondrichthian fossil because: A its dorsal fins were used to walk across the bottom of the ocean B it had heterodont dentition C it was the first example of a species with a rostrum D it had ligamentous teeth arranged in a whorl-shape arrangement

16. 14True or False: The class chondrichthyes includes the largest animals to ever exist on the planet. True False

17. 15A spiracle on a sting ray is located A near the nostrils B behind the eyes C in the middle of the back D directly anterior of the caudal fin/tail.

18. 16Which of the following is used to help nocturnal hunters like sharks see well even in limited light: A melanin B nititating membranes C lateral line D tapetum lucidum

19. 17A shark with the following type of teeth most likely eats A large fish or mammals B small, schooling fish C clams and bivalves D krill and plankton

20. 18Which of the following is TRUE about the feature circled on the following phylogenetic tree: A These traits can be found only in the group Agnatha B These characteristics can be best seen in Chondrichthyes C These traits only apply to Myxini (hagfish) D These traits are connected to all organisms on this chart

22. 19Which of the following does NOT shed many teeth throughout its lifetime A Great White sharks (Elasmobranchii) B Tiger sharks (aggressive) C Greenland sharks (slow moving) D Ghost fish (chimera)

23. 20Which of the following is NOT a description of squaloid sharks? A they have relatively small brains B they tend to live in colder waters C their total numbers are more diverse than neoselachii D they tend to live in deeper waters