Question 1

Marine mammals use echolocation to detect objects. For echolocation to work, marine mammals must be able to ________.

Accepted Answer

A)   generate rapidly produced clicks of short duration
B)   detect faint echoes as their clicks reflect back from objects
C)   screen out unrelated loud noises in the sea
D)   evaluate the time and direction of return sounds
E)   All of these are correct.F) C) and E)
G) A) and B)

Question 2

The most numerous organisms in the sea are fish.

Accepted Answer

A) True 
 B)False

Question 3

Sea snakes are found in the Atlantic, Pacific, and Indian Oceans.

Accepted Answer

A) True 
 B)False  False

Question 4

All toothed whales use echolocation except baleen whales.

Accepted Answer

A) True 
 B)False

Question 5

The smallest marine mammal is a ________.

Accepted Answer

A)   seal
B)   fur seal
C)   sea lion
D)   sea otter
E)   dugongF) All of the above
G) B) and D)

Question 6

Whales and seals increase their floatation by ________.

Accepted Answer

A)   filling their swim bladders with large quantities of gas
B)   storing large quantities of low-density fat
C)   blowing bubbles while swimming
D)   storing nitrogen in their blood
E)   having specialized air cavities in their bonesF) C) and D)
G) B) and E)

Question 7

Which of the following reptile groups is not represented in the ocean?

Accepted Answer

A)   crocodilians
B)   snakes
C)   lizards
D)   turtles
E)   All of these are correct.F) B) and D)
G) B) and C)

Question 8

Marine mammals are able to maintain their own body temperature internally.

Accepted Answer

A) True 
 B)False

Question 9

The very large eyes of the giant and colossal squid are adapted to ________.

Accepted Answer

A)   detect bioluminescence
B)   identify their prey
C)   detect ultraviolet light
D)   glow in the darkE) B) and C)
F) A) and D)

Question 10

Sea otters depend on a thick layer of fat (blubber) to stay warm.

Accepted Answer

A) True 
 B)False

Question 11

Each year, the bowhead and beluga whales migrate from Antarctica to southern California.

Accepted Answer

A) True 
 B)False

Question 12

Walrus feed on ________.

Accepted Answer

A)   krill
B)   squid
C)   small fish
D)   shellfish
E)   small sealsF) C) and D)
G) C) and E)

Question 13

Which of the following increased humans' abilities to harvest the great whales?

Accepted Answer

A)   the explosive harpoon
B)   motorized hunting vessels and factory ships
C)   sonar
D)   the explosive harpoon and motorized hunting vessels and factory ships
E)   All of these are correct.F) C) and D)
G) B) and D)

Question 14

Sea snakes spend less than half their time in the marine environment.

Accepted Answer

A) True 
 B)False

Question 15

In what year was the Marine Mammal Protection Act established?

Accepted Answer

A)   1913
B)   1920
C)   1945
D)   1965
E)   1972F) B) and C)
G) A) and B) E

Question 16

One particular feature found in bony fishes but is absent in cartilaginous fishes is ________.

Accepted Answer

A)   scales
B)   gills
C)   a swim bladder
D)   a pectoral fin
E)   a skeletonF) B) and D)
G) A) and B)

Question 17

Baleen whales lack ________.

Accepted Answer

A)   flukes
B)   teeth
C)   a dorsal fin
D)   a blowhole
E)   an ear openingF) C) and E)
G) A) and B) B

Question 18

The large tusks of the male walrus are used exclusively for fighting off other males during the mating season.

Accepted Answer

A) True 
 B)False

Question 19

Dolphins and porpoises are small-toothed whales.

Accepted Answer

A) True 
 B)False

Question 20

There are no endothermic marine organisms.

Accepted Answer

A) True 
 B)False

Exam 13: The Nekton: Swimmers of the Sea

Marine mammals use echolocation to detect objects. For echolocation to work, marine mammals must be able to ________.

Correct AnswerverifiedShow Answer

The most numerous organisms in the sea are fish.

Correct AnswerverifiedShow Answer

Sea snakes are found in the Atlantic, Pacific, and Indian Oceans.

Correct AnswerverifiedFalse

All toothed whales use echolocation except baleen whales.

Correct AnswerverifiedShow Answer

The smallest marine mammal is a ________.

Correct AnswerverifiedShow Answer

Whales and seals increase their floatation by ________.

Correct AnswerverifiedShow Answer

Which of the following reptile groups is not represented in the ocean?

Correct AnswerverifiedShow Answer

Marine mammals are able to maintain their own body temperature internally.

Correct AnswerverifiedShow Answer

The very large eyes of the giant and colossal squid are adapted to ________.

Correct AnswerverifiedShow Answer

Sea otters depend on a thick layer of fat (blubber) to stay warm.

Correct AnswerverifiedShow Answer

Each year, the bowhead and beluga whales migrate from Antarctica to southern California.

Correct AnswerverifiedShow Answer

Walrus feed on ________.

Correct AnswerverifiedShow Answer

Which of the following increased humans' abilities to harvest the great whales?

Correct AnswerverifiedShow Answer

Sea snakes spend less than half their time in the marine environment.

Correct AnswerverifiedShow Answer

In what year was the Marine Mammal Protection Act established?

Correct AnswerverifiedE

One particular feature found in bony fishes but is absent in cartilaginous fishes is ________.

Correct AnswerverifiedShow Answer

Baleen whales lack ________.

Correct AnswerverifiedB

The large tusks of the male walrus are used exclusively for fighting off other males during the mating season.

Correct AnswerverifiedShow Answer

Dolphins and porpoises are small-toothed whales.

Correct AnswerverifiedShow Answer

There are no endothermic marine organisms.

Correct AnswerverifiedShow Answer

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False

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E

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B

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