Question 1

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

Accepted Answer

A)   overharvesting.
B)   competition with exotic species.
C)   habitat destruction.
D)   competition with native species.
E)   random chance.F) D) and E)
G) B) and D)

Question 2

Melting of ice from sources on land (glaciers)raises sea levels.

Accepted Answer

A) True 
 B)False

Question 3

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

Accepted Answer

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

Question 4

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) None of the above
G) B) and E)

Question 5

The background species extinction rate

Accepted Answer

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

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

In examining water samples preserved in glass jars over the last century,you notice a steadily declining pH.What is the most likely general explanation?

Accepted Answer

A)   gradual eutrophication of water sources
B)   rising atmospheric carbon dioxide levels leading to gradual acidification
C)   dumping of acids in waterways
D)   mislabeling of samples
E)   None of the answer choices is correct.F) A) and D)
G) A) and B) B

Question 8

Any chemical,physical,or biological change in the environment that harms living organisms is

Accepted Answer

A)   nitrification.
B)   an upwelling.
C)   deforestation.
D)   ozone depletion.
E)   pollution.F) None of the above
G) C) and E) E

Question 9

The normal pH of rainfall is

Accepted Answer

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

Question 10

If you found a species of plant consisting of widely separated small populations,what might you expect?

Accepted Answer

A)   low genetic diversity
B)   bottleneck effects
C)   increased likelihood of extinction
D)   genetic isolation among subpopulations
E)   All of the answer choices are correct.F) A) and E)
G) A) and C)

Question 11

If you are planning to test a new cream designed to protect Australian cows' udders against decreased layers of ozone,you would need a lamp producing what kind of light?

Accepted Answer

A)   ultraviolet
B)   violet
C)   red
D)   blue
E)   greenF) A) and E)
G) None of the above A

Question 12

Lodgepole chipmunks have moved to higher elevations in the last century as temperatures at Yellowstone warmed.

Accepted Answer

A) True 
 B)False

Question 13

If you were preparing a generalized plan to conserve biodiversity,besides habitat destruction,you would list eutrophication as the primary threat to biodiversity.

Accepted Answer

A) True 
 B)False

Question 14

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) D) and E)
G) B) and C)

Question 15

The greatest threat to the endangered great spotted kiwi of New Zealand is introduced predators.

Accepted Answer

A) True 
 B)False

Question 16

Air pollution in the lower atmosphere charterized by a visible haze is called a fug.

Accepted Answer

A) True 
 B)False

Question 17

Smog,among other things,indicates change in large-scale chemical cycles.

Accepted Answer

A) True 
 B)False

Question 18

Overexploitation is harvesting a species faster than it can reproduce.

Accepted Answer

A) True 
 B)False

Question 19

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

Question 20

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

Accepted Answer

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

Exam 40: Preserving Biodiversity

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

Correct AnswerverifiedShow Answer

Melting of ice from sources on land (glaciers)raises sea levels.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The background species extinction rate

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In examining water samples preserved in glass jars over the last century,you notice a steadily declining pH.What is the most likely general explanation?

Correct AnswerverifiedB

Any chemical,physical,or biological change in the environment that harms living organisms is

Correct AnswerverifiedE

The normal pH of rainfall is

Correct AnswerverifiedShow Answer

If you found a species of plant consisting of widely separated small populations,what might you expect?

Correct AnswerverifiedShow Answer

If you are planning to test a new cream designed to protect Australian cows' udders against decreased layers of ozone,you would need a lamp producing what kind of light?

Correct AnswerverifiedA

Lodgepole chipmunks have moved to higher elevations in the last century as temperatures at Yellowstone warmed.

Correct AnswerverifiedShow Answer

If you were preparing a generalized plan to conserve biodiversity,besides habitat destruction,you would list eutrophication as the primary threat to biodiversity.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The greatest threat to the endangered great spotted kiwi of New Zealand is introduced predators.

Correct AnswerverifiedShow Answer

Air pollution in the lower atmosphere charterized by a visible haze is called a fug.

Correct AnswerverifiedShow Answer

Smog,among other things,indicates change in large-scale chemical cycles.

Correct AnswerverifiedShow Answer

Overexploitation is harvesting a species faster than it can reproduce.

Correct AnswerverifiedShow Answer

How is tropical deforestation linked to climate change?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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A

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