1. Unit #9 Quiz #2 2012-2013 Grade: «grade» Subject: Aquatic Science Date: «date»

2. 1The two groups of whales are A baleen & toothed B baleen & cetacean C toothed & cetacean D cetacean& pinniped

3. 2Mammals have a _______ chambered heart. A 2 B 3 C 4 D 5

4. 3Which order of mammals has made the most complete transition to aquatic life A Carnivora B Cetaceans C Edentata D Pinnipeds

5. 4Polar bears can be found in the __________ region(s) A Antarctic B Temperate C Equatorial D Arctic

6. 5Dugongs can be found near: A Florida B New England C West Africa D Australia

7. 6Sea otters were hunted near extinction because: A Sea otters were considered pest near aquaculture farms B Sea otters have the most dense hair of any known animal C Sea otters lost most of their habitat due to kelp farming D Sea otters lost their major food souce (sea urchins) due to pollution

8. 7Sea otters and polar bears are in which of the following orders: A Carnivera B Pinneped C Cetacean D Serinia

9. 8All of the following are true when comparing seals and sea lions, EXCEPT: A Sea lions have external ears B Anterior legs of seals are not useful for walking C Seals have external ears D Anterior legs of sea lions are useful for walking on land

10. 9Sea otters are considered a capstone/keystone species. This means: A without this species the ecosystem will become destabilized B this species is responsible for keeping the bottom of the food chain stable C this species is considered an apex predator D as this species grows in population size, so does the overall population of the food chain

11. 10Which of the following is a Cetacean? A polar bear B dolphin C seal D sea lion

12. 11Cetaceans (dolphins/whales) look a lot like chondrichthyes, these similar structures are A homologous B evolutionary C analogous D caudal fins

13. 12All of the following are characteristics of Pinnepeds, EXCEPT: A They have the most dense fur of any mammal B They are predominately carnivores C They are streamline and excellent swimmers D Examples of pinnepeds are seals, sea lions, and walruses

14. 13Which species is the largest (physically) of Pinnepeds A seals B dolphins C walruses D sea lions

15. 14All of the following help cetaceans maintain their body temperature in cold waters, EXCEPT: A large amounts of blubber B dense hair for insulation C high metabolic rates D counter current blood flow

16. 15All of the following are true when considering sea otters, EXCEPT: A they have the most dense fur of any mammal B they are known for their use of tools C they are territorial D they use blubber to keep themselves warm and afloat

17. 16A baleen is/are A large oval teeth B an organ used for echolocation C large, flat teeth for chewing plants D a series of fibrous plates

18. 17Which of the following is a Pinneped A sea lion B dolphin C polar bear D otter

19. 18A walrus uses which of the following to detect the presence of bivalves in the sand A Tusks B Teeth C Whiskers D Front flippers with vestigial nails

20. 19The root of the word mammal comes from the fact that mammals have A more than 3 chambers in their heart B fur that covers most of their bodies C the ability to give live birth D mammory glands

21. 20All of the following countries still participate in whaling, EXCEPT: A Japan B Norway C New Zealand D Faroe Island

22. 21All of the following are characteristics of mammals, EXCEPT: A They are viviparous B They nurse their young C They are ectothermic D They all have hair/fur at some point in their lives