Question 1

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 C)
G) All of the above

Question 2

One key to reversing environmental decline is to slow the growth of the human population.

Accepted Answer

A) True 
 B)False

Question 3

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

Accepted Answer

A) True 
 B)False  True

Question 4

In many wetlands, nonnative purple loosestrife has become the dominant plant species, often accounting for 90% of the total plant mass. The populations of cattails, canvasback ducks, and bog turtles have decreased in areas with purple loosestrife.
-Purple loosestrife are a(n)

Accepted Answer

A)   exotic species.
B)   native species.
C)   consumer.
D)   parasite.
E)   beneficial species.F) A) and C)
G) A) and E)

Question 5

Conservation biologists 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 has occurred.
D)   The wild pandas cannot breed.
E)   Their population density is too high.F) A) and B)
G) A) and D)

Question 6

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) B) and E)

Question 7

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) A) and E)
G) C) and E) A

Question 8

Forests are expanding and deserts are shrinking worldwide.

Accepted Answer

A) True 
 B)False  False

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) C) and D)

Question 10

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

Question 11

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) C) and D)
G) None of the above

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

In addition to eutrophication in lakes,which process is 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) B) and C)
G) None of the above

Question 14

A worldwide loss of biodiversity is underway because of human activities.

Accepted Answer

A) True 
 B)False

Question 15

Particulates are

Accepted Answer

A)   found in streams of water.
B)   carried by air.
C)   not a concern of air quality.
D)   approximately 1 cm. in diameter.
E)   all nonliving.F) B) and E)
G) A) and B)

Question 16

Conservation biologists study the preservation of biodiversity.

Accepted Answer

A) True 
 B)False

Question 17

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 D)
G) D) and E)

Question 18

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) A) and E)
G) B) and C)

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

Greenhouse gases block

Accepted Answer

A)   carbon dioxide from escaping Earth's atmosphere.
B)   oxygen from escaping Earth's atmosphere.
C)   UV wavelengths from reaching Earth's surface.
D)   UV wavelengths from escaping Earth's atmosphere.
E)   heat from escaping Earth's atmosphere.F) A) and E)
G) A) and D)

Exam 20: Preserving Biodiversity

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

Correct AnswerverifiedShow Answer

One key to reversing environmental decline is to slow the growth of the human population.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedTrue

In many wetlands, nonnative purple loosestrife has become the dominant plant species, often accounting for 90% of the total plant mass. The populations of cattails, canvasback ducks, and bog turtles have decreased in areas with purple loosestrife. -Purple loosestrife are a(n)

Correct AnswerverifiedShow Answer

Conservation biologists 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

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedA

Forests are expanding and deserts are shrinking worldwide.

Correct AnswerverifiedFalse

What areas are most susceptible to loss of biodiversity?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A worldwide loss of biodiversity is underway because of human activities.

Correct AnswerverifiedShow Answer

Particulates are

Correct AnswerverifiedShow Answer

Conservation biologists study the preservation of biodiversity.

Correct AnswerverifiedShow Answer

Which of the following is NOT an invasive species?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Greenhouse gases block

Correct AnswerverifiedShow Answer

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True

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