Question 1

Persistent chemicals such as pesticides are particularly harmful to the environment because they:

Accepted Answer

A) Are toxic to plants and other autotrophs. 
B) Are not soluble in seawater. 
C) Interfere with the oxygen intake of organisms. 
D) Are toxic since they are radioactive. 
E) Accumulate in organisms that are higher in the food chain. 
A) Are toxic to plants and other autotrophs. 
B) Are not soluble in seawater. 
C) Interfere with the oxygen intake of organisms. 
D) Are toxic since they are radioactive. 
E) Accumulate in organisms that are higher in the food chain.

Question 2

One of the following has been implicated in abnormal sexual behavior in seabirds:

Accepted Answer

A) Sewage pollution. 
B) Chlorinated hydrocarbons. 
C) Thermal pollution. 
D) Heavy metals. 
E) Eutrophication. 
A) Sewage pollution. 
B) Chlorinated hydrocarbons. 
C) Thermal pollution. 
D) Heavy metals. 
E) Eutrophication.

Question 3

Heavy metals include all of the following except:

Accepted Answer

A) Lead. 
B) PCBs. 
C) Mercury. 
D) Cadmium. 
E) Copper. 
A) Lead. 
B) PCBs. 
C) Mercury. 
D) Cadmium. 
E) Copper.

Question 4

Mercury toxicity has been directly linked with one of the following health problems in humans:

Accepted Answer

A) Hepatitis. 
B) Cancer. 
C) Neurological disorders and paralysis. 
D) Digestive disorders. 
E) Respiratory problems. 
A) Hepatitis. 
B) Cancer. 
C) Neurological disorders and paralysis. 
D) Digestive disorders. 
E) Respiratory problems.

Question 5

PCBs are characterized by being:

Accepted Answer

A) Persistent. 
B) Easily biodegradable. 
C) Radioactive. 
D) Responsible for global warming. 
E) Responsible for eutrophication. 
A) Persistent. 
B) Easily biodegradable. 
C) Radioactive. 
D) Responsible for global warming. 
E) Responsible for eutrophication.

Question 6

Trawling is particularly destructive to:

Accepted Answer

A) Soft bottom communities. 
B) Coral reefs. 
C) Sandy beaches. 
D) Salt marshes. 
E) Abyssal plains. 
A) Soft bottom communities. 
B) Coral reefs. 
C) Sandy beaches. 
D) Salt marshes. 
E) Abyssal plains.

Question 7

Efforts to restore kelp forests include:

Accepted Answer

A) Transplantation of sea urchins. 
B) Cutting kelp just below the surface of the water. 
C) Transplanting young kelp. 
D) Seeding with fertilizers. 
E) Growing kelp along floating rafts. 
A) Transplantation of sea urchins. 
B) Cutting kelp just below the surface of the water. 
C) Transplanting young kelp. 
D) Seeding with fertilizers. 
E) Growing kelp along floating rafts.

Question 8

Furans are pollutants that belong among the:

Accepted Answer

A) PCBs. 
B) Chlorinated hydrocarbons. 
C) Heavy metals. 
D) Thermal pollutants. 
E) Radioactive wastes. 
A) PCBs. 
B) Chlorinated hydrocarbons. 
C) Heavy metals. 
D) Thermal pollutants. 
E) Radioactive wastes.

Question 9

A threatened species is one that is:

Accepted Answer

A) In immediate danger of extinction. 
B) At risk of extinction since its members are low in number. 
C) Not at risk even if its members are low in number. 
D) At great risk since it only exists in zoos or marine parks. 
E) Within a few years of disappearing forever. 
A) In immediate danger of extinction. 
B) At risk of extinction since its members are low in number. 
C) Not at risk even if its members are low in number. 
D) At great risk since it only exists in zoos or marine parks. 
E) Within a few years of disappearing forever.

Question 10

Chlorinated hydrocarbon pesticides would be likely to be found in the greatest concentrations in the tissues of:

Accepted Answer

A) Phytoplankton. 
B) Zooplankton. 
C) Plankton-eating fishes. 
D) Carnivorous fishes. 
E) Seals and sea lions. 
A) Phytoplankton. 
B) Zooplankton. 
C) Plankton-eating fishes. 
D) Carnivorous fishes. 
E) Seals and sea lions.

Question 11

The most harmful oil spills in terms of large-scale damage to the marine environment:

Accepted Answer

A) Discharge from refineries. 
B) Discharge of oil during the unloading of tankers. 
C) Sinking or collision of tankers. 
D) Runoff from coastal cities. 
E) Natural seepage. 
A) Discharge from refineries. 
B) Discharge of oil during the unloading of tankers. 
C) Sinking or collision of tankers. 
D) Runoff from coastal cities. 
E) Natural seepage.

Question 12

A persistent chemical is one that is:

Accepted Answer

A) Toxic. 
B) Non-biodegradable. 
C) A thermal pollutant. 
D) Insoluble in water. 
E) Resistant to detergents. 
A) Toxic. 
B) Non-biodegradable. 
C) A thermal pollutant. 
D) Insoluble in water. 
E) Resistant to detergents.

Question 13

The two most persistent sources of oil pollution that keep oil in the marine environment for sustained periods are:

Accepted Answer

A) Tanker and storage leak accidents. 
B) Tar balls and tanker accidents. 
C) Natural seepage and urban runoff. 
D) Urban wastes and normal operation of tankers. 
E) Refinery discharges. 
A) Tanker and storage leak accidents. 
B) Tar balls and tanker accidents. 
C) Natural seepage and urban runoff. 
D) Urban wastes and normal operation of tankers. 
E) Refinery discharges.

Persistent chemicals such as pesticides are particularly harmful to the environment because they:

One of the following has been implicated in abnormal sexual behavior in seabirds:

Heavy metals include all of the following except:

Mercury toxicity has been directly linked with one of the following health problems in humans:

PCBs are characterized by being:

Trawling is particularly destructive to:

Efforts to restore kelp forests include:

Furans are pollutants that belong among the:

A threatened species is one that is:

Chlorinated hydrocarbon pesticides would be likely to be found in the greatest concentrations in the tissues of:

The most harmful oil spills in terms of large-scale damage to the marine environment:

A persistent chemical is one that is:

The two most persistent sources of oil pollution that keep oil in the marine environment for sustained periods are:

The Science of Marine Biology

The Sea Floor

Chemical and Physical Features of Seawater and the World Ocean

Fundamentals of Biology

The Microbial World

Multicellular Primary Producers: Seaweeds and Plants

Marine Animals Without a Backbone

Marine Fishes

Marine Reptiles, Birds, and Mammals

An Introduction to Marine Ecology

Between the Tides

Estuaries: Where Rivers Meet the Sea

Life on the Continental Shelf

Coral Reefs

Life Near the Surface

The Ocean Depths

Resources From the Sea

The Oceans and Human Affairs

Filters

Exam 18: The Impact of Humans on the Marine Environment

Persistent chemicals such as pesticides are particularly harmful to the environment because they:

One of the following has been implicated in abnormal sexual behavior in seabirds:

Heavy metals include all of the following except:

Mercury toxicity has been directly linked with one of the following health problems in humans:

PCBs are characterized by being:

Trawling is particularly destructive to:

Efforts to restore kelp forests include:

Furans are pollutants that belong among the:

A threatened species is one that is:

Chlorinated hydrocarbon pesticides would be likely to be found in the greatest concentrations in the tissues of:

The most harmful oil spills in terms of large-scale damage to the marine environment:

A persistent chemical is one that is:

The two most persistent sources of oil pollution that keep oil in the marine environment for sustained periods are:

The Science of Marine Biology

The Sea Floor

Chemical and Physical Features of Seawater and the World Ocean

Fundamentals of Biology

The Microbial World

Multicellular Primary Producers: Seaweeds and Plants

Marine Animals Without a Backbone

Marine Fishes

Marine Reptiles, Birds, and Mammals

An Introduction to Marine Ecology

Between the Tides

Estuaries: Where Rivers Meet the Sea

Life on the Continental Shelf

Coral Reefs

Life Near the Surface

The Ocean Depths

Resources From the Sea

The Oceans and Human Affairs

Filters