Question 1

Sixty percent of the world's forests are old-growth forests.

Accepted Answer

A) True 
 B)False

Question 2

Overgrazing occurs when too many animals graze for too long and exceed the carrying capacity of a rangeland area.Overgrazing causes all of the following except ____.

Accepted Answer

A)  reduced grass cover 
B)  exposure of the soil to wind erosion 
C)  increased retention of water 
D)  compacted soil 
E)  more invasion by inedible plant species 
A)  reduced grass cover 
B)  exposure of the soil to wind erosion 
C)  increased retention of water 
D)  compacted soil 
E)  more invasion by inedible plant species

Question 3

Ecologists and forest fire experts recommend several strategies for reducing fire-related harm to forests and people.What is one of those strategies?

Accepted Answer

A)  Encourage growth of young trees and underbrush. 
B)  Set small,contained surface fires in highest-risk forest areas. 
C)  Set crown fires in highest-risk forest areas. 
D)  Prevent all fires on public lands. 
E)  Thin a zone of 150 meters around houses and buildings in fire prone areas. 
A)  Encourage growth of young trees and underbrush. 
B)  Set small,contained surface fires in highest-risk forest areas. 
C)  Set crown fires in highest-risk forest areas. 
D)  Prevent all fires on public lands. 
E)  Thin a zone of 150 meters around houses and buildings in fire prone areas.

Question 4

Many biologists and wildlife conservationists believe that the best way to keep from hastening the extinction of wild species through human activities is to protect threatened habitats and ecosystem services.This is referred to as ____.

Accepted Answer

A)  the wilderness approach 
B)  ecosystem rehabilitation 
C)  environmental conservation 
D)  the ecosystem approach 
E)  biodiversity consideration 
A)  the wilderness approach 
B)  ecosystem rehabilitation 
C)  environmental conservation 
D)  the ecosystem approach 
E)  biodiversity consideration

Question 5

Which of the following is true of surface fires?

Accepted Answer

A)  They increase the chance of crown fires. 
B)  They kill all vegetation and wildlife in their path. 
C)  They prevent the germination of trees species like jack pine and the giant sequoia. 
D)  They free mineral nutrients that are locked up in vegetation and litter. 
E)  They destroy mineral nutrients that are locked up in vegetation. 
A)  They increase the chance of crown fires. 
B)  They kill all vegetation and wildlife in their path. 
C)  They prevent the germination of trees species like jack pine and the giant sequoia. 
D)  They free mineral nutrients that are locked up in vegetation and litter. 
E)  They destroy mineral nutrients that are locked up in vegetation.

Question 6

Four of the following are measures to speed up ecosystem recovery;one is not.Choose the one that is not.

Accepted Answer

A)  rehabilitation 
B)  secondary succession 
C)  replacement 
D)  creating artificial ecosystems 
E)  restoration 
A)  rehabilitation 
B)  secondary succession 
C)  replacement 
D)  creating artificial ecosystems 
E)  restoration

Question 7

How is wilderness defined and who was the first president to set aside designated wilderness areas in the U.S.?

Accepted Answer

Wilderness is land officially designated

Question 8

Most biologists believe that we should care about sustaining forests because they provide valuable ____________________ and ____________________ services.

Accepted Answer

ecosystem

Question 9

Forests covering approximately 30% of the U.S.land area supply about two-thirds of the nation's surface water.

Accepted Answer

A) True 
 B)False

Question 10

Surface fires ____.

Accepted Answer

A)  increase topsoil erosion 
B)  kill large numbers of wildlife 
C)  usually burn only undergrowth and leaf litter on the forest floor 
D)  usually burn whole trees from the base up 
E)  spread rapidly and can destroy most vegetation 
A)  increase topsoil erosion 
B)  kill large numbers of wildlife 
C)  usually burn only undergrowth and leaf litter on the forest floor 
D)  usually burn whole trees from the base up 
E)  spread rapidly and can destroy most vegetation

Question 11

Humans have reserved ____________________% of the earth's land for human use.

Accepted Answer

The answer of Humans have reserved ____________________% of the earth's...

Question 12

Efforts are under way to make charcoal out of fibers left over from processing sugar cane.

Accepted Answer

A) True 
 B)False

Question 13

Brazil has more than ____________________% of the world's remaining tropical rain forests.

Accepted Answer

The answer of Brazil has more than ____________________% of the...

Question 14

A 1997 report estimated the value of the ecological services provided to humans by forests to be at least $4.7 trillion.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following is a harmful effect of even carefully designed logging roads?

Accepted Answer

A)  increased erosion 
B)  habitat corridors 
C)  decreased sediment runoff 
D)  increased access to farms,mines,and ranches 
E)  increased native biodiversity 
A)  increased erosion 
B)  habitat corridors 
C)  decreased sediment runoff 
D)  increased access to farms,mines,and ranches 
E)  increased native biodiversity

Question 16

-How much larger is the value of climate regulation than recreation?

Accepted Answer

approximat

Question 17

Overgrazing is a significant cause of degradation of grassland in the United States.Why is overgrazing so devastating to grassland? Why would the people who control grazing allow overgrazing to happen,given what we know about the problems associated with it?

Accepted Answer

Overgrazing removes not only the upper p

Question 18

Which of the following is a method of grassland restoration?

Accepted Answer

A)  removal of riparian areas and water holes from grasslands 
B)  removal of salt blocks for cattle 
C)  eliminating herbicide use allowing all plants to grow 
D)  use of portable fencing to confine cattle to ungrazed areas 
E)  removal of native grasses to reduce growth 
A)  removal of riparian areas and water holes from grasslands 
B)  removal of salt blocks for cattle 
C)  eliminating herbicide use allowing all plants to grow 
D)  use of portable fencing to confine cattle to ungrazed areas 
E)  removal of native grasses to reduce growth

Question 19

People have,seemingly,always feared the wolf.In order to restore and sustain biodiversity in ecosystems in which the wolf is a keystone species,the gray wolf was reintroduced into such ecosystems.Given human concerns and fears about wolves,was this the correct decision?

Accepted Answer

The data collected as the reintroduction

Question 20

According to the USDA,within _______________ we could eliminate the need to use trees to make paper by using kenaf.

Accepted Answer

2-3 decade

Exam 10: Sustaining Terrestrial Biodiversity: The Ecosystem Approach

Sixty percent of the world's forests are old-growth forests.

Overgrazing occurs when too many animals graze for too long and exceed the carrying capacity of a rangeland area.Overgrazing causes all of the following except ____.

Ecologists and forest fire experts recommend several strategies for reducing fire-related harm to forests and people.What is one of those strategies?

Many biologists and wildlife conservationists believe that the best way to keep from hastening the extinction of wild species through human activities is to protect threatened habitats and ecosystem services.This is referred to as ____.

Which of the following is true of surface fires?

Four of the following are measures to speed up ecosystem recovery;one is not.Choose the one that is not.

How is wilderness defined and who was the first president to set aside designated wilderness areas in the U.S.?

Most biologists believe that we should care about sustaining forests because they provide valuable ____________________ and ____________________ services.

Forests covering approximately 30% of the U.S.land area supply about two-thirds of the nation's surface water.

Surface fires ____.

Humans have reserved ____________________% of the earth's land for human use.

Efforts are under way to make charcoal out of fibers left over from processing sugar cane.

Brazil has more than ____________________% of the world's remaining tropical rain forests.

A 1997 report estimated the value of the ecological services provided to humans by forests to be at least $4.7 trillion.

Which of the following is a harmful effect of even carefully designed logging roads?

-How much larger is the value of climate regulation than recreation?

Overgrazing is a significant cause of degradation of grassland in the United States.Why is overgrazing so devastating to grassland? Why would the people who control grazing allow overgrazing to happen,given what we know about the problems associated with it?

Which of the following is a method of grassland restoration?

People have,seemingly,always feared the wolf.In order to restore and sustain biodiversity in ecosystems in which the wolf is a keystone species,the gray wolf was reintroduced into such ecosystems.Given human concerns and fears about wolves,was this the correct decision?

According to the USDA,within _______________ we could eliminate the need to use trees to make paper by using kenaf.

Environmental Problems, their Causes, and Sustainability

Science, matter, energy, and Systems

Ecosystems: What Are They and How Do They Work

Biodiversity and Evolution

Biodiversity, species Interactions, and Population Control

The Human Population and Its Impact

Climate and Biodiversity

Aquatic Biodiversity

Sustaining Biodiversity: The Species Approach

Sustaining Aquatic Biodiversity

Food, soil, and Pest Management

Water Resources

Geology and Nonrenewable Mineral Resources

Nonrenewable Energy

Energy Efficiency and Renewable Energy

Environmental Hazards and Human Health

Air Pollution

Climate Disruption and Ozone Depletion

Water Pollution

Solid and Hazardous Waste

Cities and Sustainability

Economics, environment, and Sustainability

Politics, environment, and Sustainability

Environmental Worldviews, ethics, and Sustainability

Filters

Most biologists believe that we should care about sustaining forests because they provide valuable and services.