Question 1

Why is it important to maintain biodiversity?

Accepted Answer

A)  To prevent habitat destruction
B)  To protect species richness
C)  To provide resources to humans
D)  All answers are correct.
E)  To maintain genetic variationF) A) and B)
G) A) and C)

Question 2

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) C) and D)
G) A) and C)

Question 3

The ozone layer absorbs much of the harmful UV wavelengths of light that would otherwise reach Earth.

Accepted Answer

A) True 
 B)False

Question 4

Each year almost _____ metric tons of carbon dioxide are released into Earth's atmosphere.

Accepted Answer

A)  500,000
B)  6,000,000
C)  1,000,000
D)  3,000,000
E)  4,000,000F) A) and B)
G) A) and E)

Question 5

Which of the following is NOT an invasive species?

Accepted Answer

A)  hydrilla in freshwater
B)  European starlings in North America
C)  the bison in the North American plains
D)  the marine toad in Florida
E)  gypsy moth caterpillars in North AmericaF) A) and C)
G) All of the above

Question 6

Habitat destruction and the greenhouse effect are the two most important threats to biodiversity.

Accepted Answer

A) True 
 B)False

Question 7

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) A) and B)
G) All of the above

Question 8

What resulted in the biodiversity on Earth?

Accepted Answer

A)  evolution
B)  global climate change
C)  the greenhouse effect
D)  overexploitation
E)  bycatchF) A) and B)
G) C) and D)

Question 9

What areas are most susceptible to loss of biodiversity?

Accepted Answer

A)  open ocean
B)  locations near human activities
C)  rain forests
D)  temperate forests
E)  polar regionsF) A) and B)
G) A) and D)

Question 10

A species that humans bring to an area where it did not previously occur is

Accepted Answer

A)  an exotic species.
B)  a native species.
C)  an endemic species.
D)  an existing species.
E)  an endangered species.F) A) and B)
G) C) and E)

Question 11

The "background" species extinction rate

Accepted Answer

A)  estimates how quickly species disappeared before human intervention.
B)  measures today's extinction rate of plants.
C)  measures today's extinction rate of animals.
D)  estimates how many extinctions humans are causing.
E)  All answers are correct.F) B) and E)
G) A) and D)

Question 12

The pH of acid deposition occurring in the eastern United States is about

Accepted Answer

A)  4.6.
B)  5.6.
C)  6.4.
D)  7.0.
E)  8.4.F) A) and E)
G) A) and C)

Question 13

In the section "Investigating Life: The Case of the Missing Frogs: Is Climate the Culprit?",what explanation do scientists give for decline in amphibians in pristine habitats with little human contact?

Accepted Answer

A)  pollution
B)  fungal infection
C)  habitat loss
D)  over harvesting
E)  competition with exotic speciesF) A) and D)
G) C) and D)

Question 14

The current extinction rate of vertebrates is 100-1000 times the historical background.This is primarily due to

Accepted Answer

A)  over-harvesting.
B)  competition with exotic species.
C)  habitat destruction.
D)  competition with native species.
E)  random chancE.F) A) and B)
G) B) and D)

Question 15

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

Accepted Answer

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

Question 16

An increase in the surface temperature of the Earth caused by heat-trapping gases in the atmosphere is known as

Accepted Answer

A)  the greenhouse effect.
B)  the biome effect.
C)  bioremediation.
D)  desertification.
E)  the nursery effect.F) C) and E)
G) A) and D)

Question 17

In a process called ______,nitrogen and phosphorus excessively fertilize algae in the water,resulting in algal blooms.

Accepted Answer

A)  particulation
B)  eutrophication
C)  denitrification
D)  nitrification
E)  desertificationF) C) and E)
G) B) and E)

Question 18

Since the 1950s,only 1% of the ocean's large predatory fish have disappeared.

Accepted Answer

A) True 
 B)False

Question 19

A 2004 study in the journal Nature concluded: "Many plant and animal species are unlikely to survive climate change.New analyses suggest that 15-37% of a sample of 1,103 land plants and animals would eventually become extinct as a result of climate changes expected by 2050.For some of these species there will no longer be anywhere suitable to live." How would the extinction of plant species lead to the extinction of animal species?

Accepted Answer

A)  Animals need plants for pollination.
B)  Plants consume carbon dioxide.
C)  Plants perform transpiration.
D)  Plants are the energy base of an ecosystem.
E)  Plants prevent soil erosion.F) A) and B)
G) C) and E)

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 20: Preserving Biodiversity

Since the 1950s,only 1% of the ocean's large predatory fish have disappeared.

Correct Answer
verified

Each year almost _____ metric tons of carbon dioxide are released into Earth's atmosphere.

Correct Answer
verified

An increase in the surface temperature of the Earth caused by heat-trapping gases in the atmosphere is known as

Correct Answer
verified

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

Correct Answer
verified

In the section "Investigating Life: The Case of the Missing Frogs: Is Climate the Culprit?",what explanation do scientists give for decline in amphibians in pristine habitats with little human contact?

Correct Answer
verified

In a process called ______,nitrogen and phosphorus excessively fertilize algae in the water,resulting in algal blooms.

Correct Answer
verified

Which of the following is NOT an invasive species?

Correct Answer
verified

What areas are most susceptible to loss of biodiversity?

Correct Answer
verified

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

Correct Answer
verified

Habitat destruction and the greenhouse effect are the two most important threats to biodiversity.

Correct Answer
verified

The current extinction rate of vertebrates is 100-1000 times the historical background.This is primarily due to

Correct Answer
verified

Correct Answer
verified

A species that humans bring to an area where it did not previously occur is

Correct Answer
verified

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

Correct Answer
verified

What resulted in the biodiversity on Earth?

Correct Answer
verified

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

Correct Answer
verified

Why is it important to maintain biodiversity?

Correct Answer
verified

The pH of acid deposition occurring in the eastern United States is about

Correct Answer
verified

The "background" species extinction rate

Correct Answer
verified

The ozone layer absorbs much of the harmful UV wavelengths of light that would otherwise reach Earth.

Correct Answer
verified

Exam 20: Preserving Biodiversity

Since the 1950s,only 1% of the ocean's large predatory fish have disappeared.

Correct AnswerverifiedShow Answer

Each year almost _____ metric tons of carbon dioxide are released into Earth's atmosphere.

Correct AnswerverifiedShow Answer

An increase in the surface temperature of the Earth caused by heat-trapping gases in the atmosphere is known as

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In the section "Investigating Life: The Case of the Missing Frogs: Is Climate the Culprit?",what explanation do scientists give for decline in amphibians in pristine habitats with little human contact?

Correct AnswerverifiedShow Answer

In a process called ______,nitrogen and phosphorus excessively fertilize algae in the water,resulting in algal blooms.

Correct AnswerverifiedShow Answer

Which of the following is NOT an invasive species?

Correct AnswerverifiedShow Answer

What areas are most susceptible to loss of biodiversity?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Habitat destruction and the greenhouse effect are the two most important threats to biodiversity.

Correct AnswerverifiedShow Answer

The current extinction rate of vertebrates is 100-1000 times the historical background.This is primarily due to

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A species that humans bring to an area where it did not previously occur is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What resulted in the biodiversity on Earth?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Why is it important to maintain biodiversity?

Correct AnswerverifiedShow Answer

The pH of acid deposition occurring in the eastern United States is about

Correct AnswerverifiedShow Answer

The "background" species extinction rate

Correct AnswerverifiedShow Answer

The ozone layer absorbs much of the harmful UV wavelengths of light that would otherwise reach Earth.

Correct AnswerverifiedShow Answer

Correct Answer
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