Question 1

The primary cause of loss of biodiversity is:

Accepted Answer

A)  Predation
B)  Parasitism
C)  Genetic mutation
D)  Habitat destruction
E)  Global warmingF) B) and D)
G) C) and D)

Question 2

The main culprits in the thinning of the ozone layer are:

Accepted Answer

A)  Carbon dioxide and nitrogen gas
B)  Water vapor, particulates, and bromine gas
C)  Bromine gas, fluorine gas, and chlorine gas
D)  Carbon dioxide, carbon monoxide, and chlorine gas
E)  Water vapor, chlorine gas, and carbon dioxideF) A) and C)
G) B) and D)

Question 3

A type of air pollution that forms a visible haze in the lower atmosphere is:

Accepted Answer

A)  Fog
B)  Paticulation
C)  Smog
D)  Acid rain
E)  SmokeF) D) and E)
G) A) and B)

Question 4

In addition to eutrophication in lakes,which process is being caused by excess nutrients in rivers?

Accepted Answer

A)  Warming of the water in the gulf of Mexico
B)  Introduction of exotic species like Zebra mussels
C)  The dead zone in the gulf of Mexico
D)  Decreased plant growth
E)  Clogging of city water linesF) C) and E)
G) A) and B)

Question 5

Sea turtles mistake plastic blobs for their natural food,the ___________________,and swallow the plastic killing the turtles.

Accepted Answer

A)  Octopus
B)  Crab
C)  Lobster
D)  Sea snakeE) A) and C)
F) B) and C)

Question 6

Since the 1950s ____________ of the ocean's large predatory fishes have disappeared.

Accepted Answer

A)  20%
B)  50%
C)  90%
D)  70%
E)  1%F) A) and C)
G) A) and B)

Question 7

The ______________________ in the stratosphere above Earth's surface absorbs much of the harmful UV wavelengths of light.

Accepted Answer

A)  Benthic zone
B)  Ozone layer
C)  Cumulus clouds
D)  Particulate layer
E)  Profundal zoneF) B) and D)
G) A) and B)

Question 8

Forests are expanding and deserts are shrinking worldwide.

Accepted Answer

A) True 
 B)False

Question 9

Canvasback ducks and bog turtles are most likely being impacted by purple loosestrife by:

Accepted Answer

A)  Competitive exclusion
B)  Loss of breeding sites
C)  Overexploitation
D)  Pollution
E)  Climate changeF) A) and E)
G) B) and E)

Question 10

What explanation do scientists give for decline in amphibians in pristine habitats and little contact with humans?

Accepted Answer

A)  Pollution
B)  Fungal infection
C)  Habitat loss
D)  Over harvesting
E)  Competition with exotic speciesF) A) and B)
G) A) and C)

Question 11

The pH of "acid rain" occurring in the eastern United States is about:

Accepted Answer

A)  4.4
B)  5.6
C)  6.4
D)  7.0
E)  8.4F) B) and E)
G) C) and D)

Question 12

After nearing extinction in the 1960s,the bald eagle population is now about 10,000.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following is not one of the world's endangered species?

Accepted Answer

A)  The Sumatran rhino
B)  The California condor
C)  The zebra mussel
D)  The vaquita
E)  The green pitcher plantF) A) and E)
G) C) and D)

Question 14

A decrease in the ozone layer and a subsequent increase in the UV radiation reaching the Earth's surface is a significant factor in the increasing number of cases of human:

Accepted Answer

A)  Lung cancer
B)  Tuberculosis
C)  Still births
D)  Skin cancer
E)  MalariaF) None of the above
G) C) and D)

Question 15

The disappearance of harlequin frogs from Costa Rica's Monteverde Cloud Forest Preserve has been shown to be related to oil spills and a skin bacterium.

Accepted Answer

A) True 
 B)False

Question 16

Conservation biologists have been able to breed some endangered species like the panda bear in captivity.Which is the most likely reason that panda populations in the wild are still threatened?

Accepted Answer

A)  Not enough animals can be bred to release into the wild
B)  Their environment is polluted
C)  Loss of habitat
D)  The wild pandas cannot breed
E)  Their population density is too highF) B) and E)
G) A) and D)

Question 17

What was a disadvantage of digging canals in the Everglades?

Accepted Answer

A)  Increased cropland
B)  Increased flooding during hurricanes
C)  Increased risk of algae blooms
D)  Increased floodplain wetlands
E)  Increased water shortages during droughtF) None of the above
G) A) and B)

Question 18

In a process called _____________________ nitrogen and phosphorous fertilize algae in the water resulting in algal blooms.

Accepted Answer

A)  Particulation
B)  Eutrophication
C)  Denitrification
D)  Nitrification
E)  DesertificationF) A) and E)
G) D) and E)

Question 19

Of every 100 species introduced only one persists to take over a niche.

Accepted Answer

A) True 
 B)False

Question 20

Commercial fisheries are increasing focusing on catching smaller fish like anchovies because of ______ large predatory fishes.

Accepted Answer

A)  Exotic
B)  Competition with
C)  Increases in
D)  Pollution in
E)  Overexploitation ofF) A) and B)
G) B) and E)

Exam 39: Conserving Biodiversity

The ______________________ in the stratosphere above Earth's surface absorbs much of the harmful UV wavelengths of light.

Correct AnswerverifiedShow Answer

The disappearance of harlequin frogs from Costa Rica's Monteverde Cloud Forest Preserve has been shown to be related to oil spills and a skin bacterium.

Correct AnswerverifiedShow Answer

Forests are expanding and deserts are shrinking worldwide.

Correct AnswerverifiedShow Answer

A type of air pollution that forms a visible haze in the lower atmosphere is:

Correct AnswerverifiedShow Answer

In a process called _____________________ nitrogen and phosphorous fertilize algae in the water resulting in algal blooms.

Correct AnswerverifiedShow Answer

The pH of "acid rain" occurring in the eastern United States is about:

Correct AnswerverifiedShow Answer

The primary cause of loss of biodiversity is:

Correct AnswerverifiedShow Answer

Commercial fisheries are increasing focusing on catching smaller fish like anchovies because of ______ large predatory fishes.

Correct AnswerverifiedShow Answer

In addition to eutrophication in lakes,which process is being caused by excess nutrients in rivers?

Correct AnswerverifiedShow Answer

Canvasback ducks and bog turtles are most likely being impacted by purple loosestrife by:

Correct AnswerverifiedShow Answer

What was a disadvantage of digging canals in the Everglades?

Correct AnswerverifiedShow Answer

Conservation biologists have been able to breed some endangered species like the panda bear in captivity.Which is the most likely reason that panda populations in the wild are still threatened?

Correct AnswerverifiedShow Answer

Of every 100 species introduced only one persists to take over a niche.

Correct AnswerverifiedShow Answer

A decrease in the ozone layer and a subsequent increase in the UV radiation reaching the Earth's surface is a significant factor in the increasing number of cases of human:

Correct AnswerverifiedShow Answer

Since the 1950s ____________ of the ocean's large predatory fishes have disappeared.

Correct AnswerverifiedShow Answer

What explanation do scientists give for decline in amphibians in pristine habitats and little contact with humans?

Correct AnswerverifiedShow Answer

Which of the following is not one of the world's endangered species?

Correct AnswerverifiedShow Answer

Sea turtles mistake plastic blobs for their natural food,the ___________________,and swallow the plastic killing the turtles.

Correct AnswerverifiedShow Answer

After nearing extinction in the 1960s,the bald eagle population is now about 10,000.

Correct AnswerverifiedShow Answer

The main culprits in the thinning of the ozone layer are:

Correct AnswerverifiedShow Answer

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