Question 1

Conservation biologists study the preservation of biodiversity.

Accepted Answer

A) True 
 B)False

Question 2

Biodiversity has declined by about ____________ percent since 1970.

Accepted Answer

A)  70
B)  30
C)  50
D)  10
E)  5F) A) and B)
G) A) and E) B

Question 3

Which of the following has contributed to the damage done to the Florida Everglades ecosystem?

Accepted Answer

A)  A drought lasting from the early 1960s to 1975
B)  Canals that drain the area to prevent flooding
C)  Levees built around Lake Okeechobeee
D)  The human population swelling to more than 4 million
E)  All are correctF) A) and B)
G) A) and E)

Question 4

Conservation biologists in the United States are protecting habitat of endangered species at the northern end of their current ranges.What is the rationale for this strategy?

Accepted Answer

A)  As global temperatures warm, biomes will move to the north
B)  Animals tend to migrate to the north
C)  Tectonic plates are shifting to the south
D)  There are fewer people in the north, so there is more habitat available
E)  Biodiversity is higher the farther north you go from the equatorF) B) and E)
G) B) and D)

Question 5

Which of the following is not a "greenhouse gas"?

Accepted Answer

A)  Carbon dioxide
B)  Methane
C)  Nitrous oxide
D)  Oxygen
E)  CFCsF) A) and E)
G) A) and D)

Question 6

Since the Endangered Species Act of 1973 was passed,about _______________ species of animals and ______________ species of plants and lichens have been placed on the list of threatened or endangered species.

Accepted Answer

A)  500, 700
B)  200, 100
C)  1000, 2000
D)  300, 300
E)  20, 50F) None of the above
G) B) and D)

Question 7

The removal of all tree cover from a forested area is desertification.

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

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 chanceF) A) and B)
G) A) and C)

Question 10

Carbon dioxide gas is not a major contributor to the greenhouse effect.

Accepted Answer

A) True 
 B)False

Question 11

If global warming continues and predictions are correct by the end of the twenty-first century,sea level on Earth will:

Accepted Answer

A)  Rise by 7 to 23 inches
B)  Remain the same
C)  Lower by 3 to 5 inches
D)  Rise by 2 to 6 inches
E)  Rise by 2 to 3 feetF) A) and D)
G) B) and D)

Question 12

Cattails are most likely being impacted by purple loosestrife by:

Accepted Answer

A)  Predation
B)  Parasitism
C)  Mutualism
D)  Competitive exclusion
E)  CommensalismF) A) and B)
G) C) and D)

Question 13

The normal pH of rainfall:

Accepted Answer

A)  Is slightly acidic, pH 5.6
B)  Is slightly basic, pH 9.6
C)  Is slightly acidic, pH 9.6
D)  Is neutral, pH 7.0
E)  Is slightly basic, pH 5.6F) C) and D)
G) B) and D)

Question 14

Greenhouse gases block:

Accepted Answer

A)  Carbon dioxide escape from the Earth
B)  Oxygen escape from the Earth
C)  UV wavelengths from reaching Earth's surface
D)  UV wavelengths escape from the Earth
E)  Heat escape from the EarthF) B) and D)
G) A) and D) E

Question 15

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." What is the best explanation for this conclusion?

Accepted Answer

A)  Carbon dioxide is toxic to plants.
B)  No plants can survive at high temperatures.
C)  Greenhouse gases will block the amount of light available for photosynthesis.
D)  Temperatures will change faster than plants can adapt.
E)  If animals go extinct the plants that depend on them will go extinct as well.F) A) and B)
G) C) and E)

Question 16

Overexploitation is harvesting a species faster than it can reproduce.

Accepted Answer

A) True 
 B)False

Question 17

Major human damage to the everglades began with the building of ___________ large canals between 1903 and 1917 to drain the area to prevent flooding.

Accepted Answer

A)  Ten
B)  Eight
C)  Six
D)  Two
E)  FourF) All of the above
G) A) and D)

Question 18

What happened to temperatures in the cloud forest over the past 40 years based on figure 39.21b?

Accepted Answer

A)  Maximum temperatures increased and minimum temperatures dropped
B)  Temperatures overall increased
C)  Temperatures overall decreased
D)  They were constant
E)  Maximum temperatures dropped and minimum temperatures increasedF) B) and C)
G) A) and D) E

Question 19

The lowest part of Earth's atmosphere is the:

Accepted Answer

A)  Ozone layer
B)  Stratosphere
C)  Troposphere
D)  Ionosphere
E)  Limnetic zoneF) A) and B)
G) B) and E)

Question 20

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 E)
G) D) and E)

Exam 39: Conserving Biodiversity

Conservation biologists study the preservation of biodiversity.

Correct Answer
verified

Biodiversity has declined by about ____________ percent since 1970.

Correct Answer
verified
B

Which of the following has contributed to the damage done to the Florida Everglades ecosystem?

Correct Answer
verified

Conservation biologists in the United States are protecting habitat of endangered species at the northern end of their current ranges.What is the rationale for this strategy?

Correct Answer
verified

Which of the following is not a "greenhouse gas"?

Correct Answer
verified

Since the Endangered Species Act of 1973 was passed,about _ species of animals and species of plants and lichens have been placed on the list of threatened or endangered species.

Correct Answer
verified

The removal of all tree cover from a forested area is desertification.

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Carbon dioxide gas is not a major contributor to the greenhouse effect.

Correct Answer
verified

If global warming continues and predictions are correct by the end of the twenty-first century,sea level on Earth will:

Correct Answer
verified

Cattails are most likely being impacted by purple loosestrife by:

Correct Answer
verified

The normal pH of rainfall:

Correct Answer
verified

Greenhouse gases block:

Correct Answer
verified
E

Correct Answer
verified

Overexploitation is harvesting a species faster than it can reproduce.

Correct Answer
verified

Major human damage to the everglades began with the building of ___________ large canals between 1903 and 1917 to drain the area to prevent flooding.

Correct Answer
verified

What happened to temperatures in the cloud forest over the past 40 years based on figure 39.21b?

Correct Answer
verified
E

The lowest part of Earth's atmosphere is the:

Correct Answer
verified

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

Correct Answer
verified

Exam 39: Conserving Biodiversity

Conservation biologists study the preservation of biodiversity.

Correct AnswerverifiedShow Answer

Biodiversity has declined by about ____________ percent since 1970.

Correct AnswerverifiedB

Which of the following has contributed to the damage done to the Florida Everglades ecosystem?

Correct AnswerverifiedShow Answer

Conservation biologists in the United States are protecting habitat of endangered species at the northern end of their current ranges.What is the rationale for this strategy?

Correct AnswerverifiedShow Answer

Which of the following is not a "greenhouse gas"?

Correct AnswerverifiedShow Answer

Since the Endangered Species Act of 1973 was passed,about _______________ species of animals and ______________ species of plants and lichens have been placed on the list of threatened or endangered species.

Correct AnswerverifiedShow Answer

The removal of all tree cover from a forested area is desertification.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Carbon dioxide gas is not a major contributor to the greenhouse effect.

Correct AnswerverifiedShow Answer

If global warming continues and predictions are correct by the end of the twenty-first century,sea level on Earth will:

Correct AnswerverifiedShow Answer

Cattails are most likely being impacted by purple loosestrife by:

Correct AnswerverifiedShow Answer

The normal pH of rainfall:

Correct AnswerverifiedShow Answer

Greenhouse gases block:

Correct AnswerverifiedE

Correct AnswerverifiedShow Answer

Overexploitation is harvesting a species faster than it can reproduce.

Correct AnswerverifiedShow Answer

Major human damage to the everglades began with the building of ___________ large canals between 1903 and 1917 to drain the area to prevent flooding.

Correct AnswerverifiedShow Answer

What happened to temperatures in the cloud forest over the past 40 years based on figure 39.21b?

Correct AnswerverifiedE

The lowest part of Earth's atmosphere is the:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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B

Correct Answer
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Correct Answer
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Correct Answer
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Since the Endangered Species Act of 1973 was passed,about _ species of animals and species of plants and lichens have been placed on the list of threatened or endangered species.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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E

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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E

Correct Answer
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Correct Answer
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