Question 1

Since the settling of North America by Europeans,only about _____ of the original temperate forest area survives.

Accepted Answer

A)   1%
B)   5%
C)   10%
D)   20%
E)   25%F) A) and D)
G) A) and C)

Question 2

A vulnerable species is one that is likely to become extinct in the more distant future.Therefore,it is not monitored by conservation biologists.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following is not an effect of acid deposition?

Accepted Answer

A)   destruction of aquatic food webs
B)   thinning of high-elevation forests
C)   decrease in the number of species that can survive in the lake ecosystem
D)   increase of pH in lakes
E)   deformities in fish and other aquatic organismsF) C) and D)
G) All of the above

Question 4

The ozone layer is part of the

Accepted Answer

A)   ionosphere.
B)   stratosphere.
C)   troposphere.
D)   biosphere.
E)   limnetic zone.F) B) and C)
G) A) and D)

Question 5

Release of sulfate and nitrate during the burning of coal contributes to

Accepted Answer

A)   acid rain.
B)   accumulation of persistent organic pollutants.
C)   loss of the ozone layer.
D)   the dead zone.
E)   All of the answer choices are correct.F) A) and D)
G) D) and E)

Question 6

The primary cause for loss of biodiversity is

Accepted Answer

A)   predation.
B)   parasitism.
C)   genetic mutation.
D)   habitat destruction.
E)   global warming.F) B) and C)
G) A) and C)

Question 7

Trees are important in the water cycle by

Accepted Answer

A)   returning water to the atmosphere.
B)   helping to recharge groundwater.
C)   preventing rainwater runoff into streams.
D)   providing an upper layer of organic matter.
E)   All the answer choices are correct.F) D) and E)
G) B) and C)

Question 8

Which of the following would be a positive environmental impact of damming a river?

Accepted Answer

A)   Fish can no longer migrate up and down the river.
B)   Animal migration may be disrupted.
C)   Streamside habitats may be disrupted.
D)   It would provide irrigation water.
E)   All of the answer choices are positive impacts for damming rivers.F) B) and E)
G) B) and D)

Question 9

Habitat destruction is the primary threat to biodiversity.

Accepted Answer

A) True 
 B)False

Question 10

Extinctions affect biodiversity.The more extinctions,

Accepted Answer

A)   the lower the species biodiversity.
B)   the lower the habitat biodiversity.
C)   the higher the genetic biodiversity.
D)   the higher the species biodiversity.
E)   the higher the habitat diversity.F) All of the above
G) A) and B)

Question 11

One important conservation tool used to restore native populations is to set aside an area and protect it from overexploitation,invasive species,and habitat destruction.

Accepted Answer

A) True 
 B)False

Question 12

How is tropical deforestation linked to climate change?

Accepted Answer

A)   Burning the forests releases carbon dioxide and transpiration by trees is diminished.
B)   Burning the forests consumes oxygen and transpiration by trees is diminished.
C)   Burning the forests releases carbon dioxide and transpiration by trees is increased.
D)   Burning the forests consumes oxygen and transpiration by trees is increased.E) A) and B)
F) B) and D)

Question 13

Which of the following is an organic chemical water pollutant?

Accepted Answer

A)   chloride ions
B)   nitrogen from fertilizer
C)   heavy metals
D)   pesticides
E)   cyanideF) A) and C)
G) B) and D)

Question 14

How is biodiversity measured in a given area?

Accepted Answer

A)   genetic diversity within the population of trees
B)   the diversity of species of trees
C)   the diversity of ecosystems in the area
D)   the diversity of species of bacteria
E)   All answers are correct.F) A) and B)
G) All of the above

Question 15

The zebra mussel and the gypsy moth are native species of North America.

Accepted Answer

A) True 
 B)False

Question 16

A species that humans bring to an area where it did not previously occur is a(n)

Accepted Answer

A)   exotic species.
B)   native species.
C)   endemic species.
D)   existing species.
E)   endangered species.F) All of the above
G) B) and C)

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

The normal pH of rainfall is

Accepted Answer

A)   slightly acidic, pH 5.6.
B)   slightly basic, pH 9.6.
C)   slightly acidic, pH 9.6.
D)   neutral, pH 7.0.
E)   slightly basic, pH 5.6.F) None of the above
G) A) and B)

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

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

Accepted Answer

A)   fog.
B)   particulation.
C)   smog.
D)   acid rain.
E)   smoke.F) A) and B)
G) A) and D)

Exam 20: Preserving Biodiversity

A vulnerable species is one that is likely to become extinct in the more distant future.Therefore,it is not monitored by conservation biologists.

Correct AnswerverifiedShow Answer

Since the settling of North America by Europeans,only about _____ of the original temperate forest area survives.

Correct AnswerverifiedShow Answer

The normal pH of rainfall is

Correct AnswerverifiedShow Answer

Which of the following is an organic chemical water pollutant?

Correct AnswerverifiedShow Answer

Habitat destruction is the primary threat to biodiversity.

Correct AnswerverifiedShow Answer

How is tropical deforestation linked to climate change?

Correct AnswerverifiedShow Answer

Which of the following is not an effect of acid deposition?

Correct AnswerverifiedShow Answer

A species that humans bring to an area where it did not previously occur is a(n)

Correct AnswerverifiedShow Answer

Release of sulfate and nitrate during the burning of coal contributes to

Correct AnswerverifiedShow Answer

Extinctions affect biodiversity.The more extinctions,

Correct AnswerverifiedShow Answer

The primary cause for loss of biodiversity is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

How is biodiversity measured in a given area?

Correct AnswerverifiedShow Answer

The zebra mussel and the gypsy moth are native species of North America.

Correct AnswerverifiedShow Answer

Which of the following would be a positive environmental impact of damming a river?

Correct AnswerverifiedShow Answer

One important conservation tool used to restore native populations is to set aside an area and protect it from overexploitation,invasive species,and habitat destruction.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The ozone layer is part of the

Correct AnswerverifiedShow Answer

Trees are important in the water cycle by

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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