Unit #9 Review Quiz Grade: «grade» Subject: Aquatic Science Date: «date»

1Which of the following was the first cetacean (that we know of) that was severely depleted from whaling due to its slow- moving & surface dwelling habits: A Blue Whale B Bottle-nosed dolphin C Humpback Whale D Right/Bowhead Whale

2Zero decibels (dB) in air is approximately _________ dB in water. A -26 B 0 C 26 D 100

3Which of the following is used by cetaceans to focus/project sounds for echolocation/communication: A The melon B The fatty lower jaw C The vocal cords D The hammer and anvil of the ear

4A loss of which of the following would prevent a common dolphin (toothed whale) from absorbing sound bouncing back during echolocation: A vocal cords B melon C mandibular fat D auditory bulbs

5Which of the following is NOT used in the formation/interpretation of sound A Melon focussing outgoing sound B Fatty lower jaw receiving sound waves C Caudal fin drumming on the swim bladder D Vocal chords creating a vibration to be sent out

6Which species is the largest (physically) of marine mammals A seals B toothed whales C walruses D baleen whales

7Polar bears can be found in the __________ region(s) A Antarctic B Temperate C Equatorial D Arctic

8Sea 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

9All of the following are possible side effects of emitting low frequency sounds into the oceans EXCEPT: A Mass stranding (200+ organisms) of marine mammals B Gas bubbles forming in the bloodstream, organs, and joints of aquatic mammals as a result of acute decompression syndrome C Cranial and pulmonary bleeding within aquatic mammals D energy from the sound pushing gas bubbles into the bloodstream through the tissue of the lungs

10All 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

11A 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

12All of the following countries still participate in whaling, EXCEPT: A Japan B Norway C New Zealand D Faroe Island

13The International Whaling Commission (IWC) was originally established in 1942 for which of the following reasons: A To prevent the slaughter of marine mammals B To regulate the amount of whaling in order to prevent "over fishing" C To prevent the "fishing" of endangered animals such as sea otters D To assist indigenous peoples in for their right to slaughter whales, even when they are considered endangered

14Why do large baleen whales use low frequency sound: A The low frequency sound is ideal for finding fatty copepods B They have long & solitary migrations & need to communicate over long distances C The lower frequency sounds are better for finding large & fatty prey D The low frequency sound is effective for short range communication within pods of whales

15Cetaceans (dolphins/whales) look a lot like chondrichthyes, these similar structures are A homologous B evolutionary C analogous D caudal fins

16All 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

17True or False: Generally, baleen whales use lower pitch sound than toothed whales. True False

18Which of the following sound waves represents the highest pitch sound: A B C D They are equal volume

19Which order of mammals have made the most complete transition to aquatic life A Carnivore B Cetaceans C Serinia D Pinnepeds

20All of the following are used by marine mammals to keep themselves warm, EXCEPT: A A large oil-filled liver B A thick layer of blubber C A high metabolism in smaller cetaceans D Countercurrent blood flow in the flukes and fins of cetaceans

21Which of the following is considered a solitary animal: A Blue Whale (baleen whale) B Common Dolphin (toothed whale) C Sea Otter (Carnivora) D Fur Seal (Pinniped)

22Sea otters and polar bears are in which of the following orders: A Carnivera B Pinneped C Cetacean D Serinia

23Which of the following determines the loudness of a sound: A B C D

24Which of the following characteristics would you expect to find in a toothed whale A Relatively large in size for a cetacean B High pitched sound is used for echolocating food C The animal lives alone for the majority of its life D The animal migrates all over the globe

25All 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

26Dugongs can be found near: A Florida B New England C West Africa D Australia

27A blue whale using sound for communication would probably create which of the following sounds A High pitched between 0 and 100 dB B Low pitched between 0 and 100 dB C Low pitched between 100 and 200 dB D High pitched between 100 and 200 dB

28Sea 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

29The image below is of a: A manatee B dugong C baleen whale D sea lion

30Which of the following sound waves represents the loudness sound: A B C D They are equal volume

31Which of the following is used by Cetaceans to keep warm: A Rete mirabile B Baleen C Oil-filled liver D Blubber

32Which of the following words best describes the sound produced by an echolocating (looking for food) toothed whale: A Click B Whistle C Groan D Squeak