Question 1

Deforestation affects the climate in what way?

Accepted Answer

A)   Decreasing global temperature
B)   Decreasing the amount of wood available for building shelter
C)   Decreasing the habitat space for forest-dwelling animals
D)   Increasing the levels of oxygen
E)   Increasing the levels of carbon dioxide

Question 2

The minimum viable population is the

Accepted Answer

A)   smallest number of males needed to maintain a population.
B)   number of organisms that can reproduce in a population.
C)   smallest number of organisms capable of maintaining a population.
D)   number of organisms that can be spread over a fragmented habitat.
E)   number of organisms produced by an inbred population.

Question 3

The leading cause of extinction by human activities worldwide is

Accepted Answer

A)   habitat fragmentation.
B)   overexploitation.
C)   invasive species.
D)   predation.
E)   pollution.

Question 4

Adult sea turtles are primarily threatened by

Accepted Answer

A)   beach development and hunting.
B)   hunting.
C)   beach development.
D)   polluted ocean waters.
E)   beach development, hunting, and polluted ocean waters.

Question 5

Why is genetic diversity within species important?

Accepted Answer

Genetic diversity allows a spe...

Question 6

What causes mass extinctions?

Accepted Answer

Several reasons have...

Question 7

Human population growth poses a threat to sustainable development.

Accepted Answer

A) True 
 B)False

Question 8

Which types of species are most likely to disappear from fragmented forests?

Accepted Answer

A)   Microbes that reproduce asexually will disappear.
B)   Species that require large tracts of land to find food and mates will disappear.
C)   Only animals will disappear; plants do not need much space.
D)   Species that reproduce in small patches will disappear.

Question 9

In less-developed countries, many species are being harvested unsustainably because

Accepted Answer

A)   they are hunted and killed because they carry human diseases.
B)   they are considered a danger to humans.
C)   the people must eat or sell the speciesʹ products to survive.
D)   people thoughtlessly destroy what they do not need.
E)   pollution has reduced their population sizes dramatically.

Question 10

Plants prevent erosion by

Accepted Answer

A)   promoting flooding.
B)   blocking winds and stabilizing soil with extensive root systems.
C)   holding water.
D)   recycling nutrients.
E)   supporting animals that consume excess water.

Question 11

What ecosystem services do wetlands perform?

Accepted Answer

Wetlands neutralize pollutants...

Question 12

What is the difficulty with establishing small, isolated reserve areas for the preservation of threatened species?

Accepted Answer

The species may require large ...

Question 13

Traditional medicines, which are used by the majority of people in less developed countries, are primarily derived from

Accepted Answer

A)   plants.
B)   commercially purchased ingredients.
C)   animals.
D)   rock.
E)   water.

Question 14

Much of the tropical rain-forest land that has been lost has been used for

Accepted Answer

A)   wildlife preserves.
B)   farmland.
C)   recreational areas.
D)   airfields to support ecotourism.
E)   human dwellings.

Question 15

Wetlands purify water by removing sediments and pollutants.

Accepted Answer

A) True 
 B)False

Question 16

Farmers who practice no-till methods commonly use herbicides.

Accepted Answer

A) True 
 B)False

Question 17

What are some benefits of sustainable development?

Accepted Answer

Sustainable development promotes long-te...

Question 18

Buying food that is commercially produced supports sustainable agriculture.

Accepted Answer

A) True 
 B)False

Question 19

-According to the graph, the human population?s biological footprint in 1965 was estimated at

Accepted Answer

A)   0.8 Earth.
B)   0.5 Earth.
C)   1 Earth.
D)   1.2 Earths.
E)   0.6 Earth.

Question 20

The term_________ describes the variety of living organisms that inhabit Earth.

Accepted Answer

The answer of The term_________ describes the variety of living...

Exam 31: Conserving Earths Biodiversity

Buying food that is commercially produced supports sustainable agriculture.

Correct AnswerverifiedShow Answer

What are some benefits of sustainable development?

Correct AnswerverifiedSustainable development promotes long-te...View AnswerShow Answer

Plants prevent erosion by

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Which types of species are most likely to disappear from fragmented forests?

Correct AnswerverifiedShow Answer

What causes mass extinctions?

Correct AnswerverifiedSeveral reasons have...View AnswerShow Answer

The minimum viable population is the

Correct AnswerverifiedShow Answer

What ecosystem services do wetlands perform?

Correct AnswerverifiedWetlands neutralize pollutants...View AnswerShow Answer

In less-developed countries, many species are being harvested unsustainably because

Correct AnswerverifiedShow Answer

What is the difficulty with establishing small, isolated reserve areas for the preservation of threatened species?

Correct AnswerverifiedThe species may require large ...View AnswerShow Answer

Farmers who practice no-till methods commonly use herbicides.

Correct AnswerverifiedShow Answer

The leading cause of extinction by human activities worldwide is

Correct AnswerverifiedShow Answer

Much of the tropical rain-forest land that has been lost has been used for

Correct AnswerverifiedShow Answer

Human population growth poses a threat to sustainable development.

Correct AnswerverifiedShow Answer

The term_________ describes the variety of living organisms that inhabit Earth.

Correct AnswerverifiedShow Answer

Wetlands purify water by removing sediments and pollutants.

Correct AnswerverifiedShow Answer

-According to the graph, the human population?s biological footprint in 1965 was estimated at

Correct AnswerverifiedShow Answer

Traditional medicines, which are used by the majority of people in less developed countries, are primarily derived from

Correct AnswerverifiedShow Answer

Deforestation affects the climate in what way?

Correct AnswerverifiedShow Answer

Why is genetic diversity within species important?

Correct AnswerverifiedGenetic diversity allows a spe...View AnswerShow Answer

Adult sea turtles are primarily threatened by

Correct AnswerverifiedShow Answer

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Sustainable development promotes long-te...
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Several reasons have...
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Wetlands neutralize pollutants...
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The species may require large ...
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Genetic diversity allows a spe...
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