Question 1

Which of the following is not true regarding coral bleaching?

Accepted Answer

A)  Can be the result of increased temperatures
B)  Bleaching events are increasing
C)  Bleaching results in no loss of zooxanthellae
D)  Bleached corals do not grow
E)  Bleached corals are vulnerably to disintegrationF) A) and C)
G) B) and E)

Question 2

Which of the following is not an effect of oil spills on the marine environment?

Accepted Answer

A)  Phytoplankton blooms
B)  Increase susceptibility to disease in fish
C)  Decreased ability to stay warm in birds
D)  Interference with normal reproduction of organismsE) None of the above
F) A) and B)

Question 3

Accumulation of sludge on the bottom of the ocean is responsible for:

Accepted Answer

A)  Anoxic,or oxygen-lacking,conditions.
B)  Drastic changes in salinity.
C)  Deposit feeders being replaced by filter feeders.
D)  Drastic changes in temperature.
E)  Increase in the number of sharks and other predators.F) B) and D)
G) A) and C) A

Question 4

Chlorinated hydrocarbons reach the marine environment by way of:

Accepted Answer

A)  Tanker accidents.
B)  Thermal pollution.
C)  Land-nesting seabirds.
D)  River runoff.
E)  Underwater volcanic eruptions.F) None of the above
G) C) and D)

Question 5

People can contract hepatitis from eating raw shellfish because shellfish:

Accepted Answer

A)  Are normal carriers of the hepatitis virus.
B)  Absorb the virus from sediment.
C)  Filter the virus from sewage-contaminated water.
D)  Are effected by algal blooms which transmit the virus.
E)  Contract the virus from passing fish.F) C) and D)
G) D) and E)

Question 6

Sludge is best defined as:

Accepted Answer

A)  Raw sewage.
B)  Semi-liquid material that results from sewage treatment.
C)  Industrial sewage.
D)  Water removed during sewage treatment.
E)  Decay bacteria in sewage.F) C) and D)
G) D) and E)

Question 7

Chlorinated hydrocarbons are found most commonly in which type of pollution:

Accepted Answer

A)  Fertilizers.
B)  Sewage.
C)  Oil.
D)  Aerosol containers.
E)  Pesticides.F) B) and C)
G) A) and E)

Question 8

Which of the following organisms are expected to show the highest concentration of DDT and other chlorinated hydrocarbons in its tissues?

Accepted Answer

A)  Filter-feeding fishes
B)  Carnivorous fishes
C)  Phytoplankton
D)  Sea lions
E)  ZooplanktonF) B) and D)
G) C) and D)

Question 9

A substance that is biodegradable:

Accepted Answer

A)  Evaporates very slowly.
B)  Forms tar balls or other solid residues.
C)  Can be broken down only by special chemicals.
D)  Sinks to the bottom.
E)  Can be broken down by bacteria.F) A) and B)
G) All of the above

Question 10

Pollution is best described as:

Accepted Answer

A)  Adding substances or energy that harm the environment.
B)  Changing the population growth of species.
C)  The decrease in the quality of the environment as a result of natural events.
D)  Substances or materials that are toxic to humans decreasing the quality of the human environment.
E)  Can be broken down by bacteria.F) C) and D)
G) A) and B)

Question 11

After oil spills,what type of marine animals is most likely to die of exposure?

Accepted Answer

A)  Migrating fishes like salmon
B)  Cetaceans
C)  Sea urchins
D)  Filter-feeding fishes
E)  SeabirdsF) A) and C)
G) B) and D)

Question 12

Eutrophication is a type of pollution caused by:

Accepted Answer

A)  Lead.
B)  DDT.
C)  Mercury.
D)  Nitrogen.
E)  PCB's.F) A) and E)
G) B) and C)

Question 13

The Steller sea cow was brought to extinction by:

Accepted Answer

A)  The destruction of kelp beds.
B)  The occupation of land by whalers.
C)  Whalers hunting for meat.
D)  The filling in of estuaries.
E)  Increase in sediments in the water brought about by the cutting of nearby forests.F) A) and E)
G) A) and C) C

Question 14

Sustainable development refers to development that:

Accepted Answer

A)  Remains stable year after year.
B)  Safeguards natural resources for future generations of people.
C)  Does not alter ocean currents,salinity or any other physical or chemical factors in the environment.
D)  Does not significantly affect the growth of wildlife.
E)  Changes depending on the importance given by future generations of the use of particular resources.F) A) and D)
G) A) and E)

Question 15

The problem of hypoxic,or "dead" zones,in the ocean is caused by:

Accepted Answer

A)  Oil pollution from tanker discharge.
B)  Lead pollution from heavy industry.
C)  Eutrophication due to algae blooms.
D)  Thermal pollution from power plants.
E)  Pesticides from agriculture.F) None of the above
G) A) and B)

Question 16

One of the following is known to be responsible for thermal pollution:

Accepted Answer

A)  Radioactive fallout.
B)  Sewage.
C)  Excessive use of fertilizers.
D)  Solid waste.
E)  Power plants.F) C) and E)
G) B) and C)

Question 17

Introduced species are known to be transported into a new location by way of:

Accepted Answer

A)  Ocean currents.
B)  Plankton brought in by currents.
C)  Transplanted oysters.
D)  Natural migration.
E)  Young individuals brought in by currents.F) B) and D)
G) B) and E)

Question 18

Reduced light availability for zooxanthellae is most related to which of these human induced factors?

Accepted Answer

A)  Increased sedimentation
B)  Thermal pollution
C)  Increased harvesting
D)  Acidification
E)  PesticidesF) B) and C)
G) A) and E)

Question 19

Artificial reefs are known to:

Accepted Answer

A)  Improve fishing.
B)  Increase pollution.
C)  Increase beach erosion.
D)  Bring unwanted introduced species.
E)  Change weather patterns.F) C) and E)
G) B) and D) A

Question 20

An anthropogenic impact is one caused by:

Accepted Answer

A)  Physical factors in the environment.
B)  Organisms that are part of marine communities.
C)  The destruction of primary producers.
D)  Organisms that live in neighboring marine communities.
E)  Human activities.F) D) and E)
G) A) and E)

Exam 18: The Impact of Humans on the Marine Environment

Which of the following is not true regarding coral bleaching?

Correct AnswerverifiedShow Answer

Which of the following is not an effect of oil spills on the marine environment?

Correct AnswerverifiedShow Answer

Accumulation of sludge on the bottom of the ocean is responsible for:

Correct AnswerverifiedA

Chlorinated hydrocarbons reach the marine environment by way of:

Correct AnswerverifiedShow Answer

People can contract hepatitis from eating raw shellfish because shellfish:

Correct AnswerverifiedShow Answer

Sludge is best defined as:

Correct AnswerverifiedShow Answer

Chlorinated hydrocarbons are found most commonly in which type of pollution:

Correct AnswerverifiedShow Answer

Which of the following organisms are expected to show the highest concentration of DDT and other chlorinated hydrocarbons in its tissues?

Correct AnswerverifiedShow Answer

A substance that is biodegradable:

Correct AnswerverifiedShow Answer

Pollution is best described as:

Correct AnswerverifiedShow Answer

After oil spills,what type of marine animals is most likely to die of exposure?

Correct AnswerverifiedShow Answer

Eutrophication is a type of pollution caused by:

Correct AnswerverifiedShow Answer

The Steller sea cow was brought to extinction by:

Correct AnswerverifiedC

Sustainable development refers to development that:

Correct AnswerverifiedShow Answer

The problem of hypoxic,or "dead" zones,in the ocean is caused by:

Correct AnswerverifiedShow Answer

One of the following is known to be responsible for thermal pollution:

Correct AnswerverifiedShow Answer

Introduced species are known to be transported into a new location by way of:

Correct AnswerverifiedShow Answer

Reduced light availability for zooxanthellae is most related to which of these human induced factors?

Correct AnswerverifiedShow Answer

Artificial reefs are known to:

Correct AnswerverifiedA

An anthropogenic impact is one caused by:

Correct AnswerverifiedShow Answer

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C

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A

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