Environmental and Conservation Biology

12 years ago

The introduction of the brown tree snake in the 1940s to the island of Guam has

The introduction of the brown tree snake in the 1940s to the island of Guam has resulted in

A) a good lesson in biological control.
B) a new species of hybrids from crossbreeding with a native snake species.
C) the extirpation o

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12 years ago

Of the following ecosystem types, which have been impacted the most by humans?

Of the following ecosystem types, which have been impacted the most by humans?

A) wetland and riparian
B) open and benthic ocean
C) tundra and arctic
D) taiga and second-growth forests
E) desert and high alpine

ppk 2938 1 Reply

12 years ago

The greatest cause of the biodiversity crisis, the one which includes all of the

The greatest cause of the biodiversity crisis, the one which includes all of the others, is

A) global warming.
B) human overpopulation.
C) habitat destruction.
D) pollution.
E) introduced species.

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12 years ago

How might the extinction of some Pacific Island bats called "flying foxes" threa

How might the extinction of some Pacific Island bats called "flying foxes" threaten the survival of over 75% of the tree species in those islands?

A) The bats consume the fruit including the seeds that would disrupt the tr

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12 years ago

Overexploitation encourages extinction and is most likely to affect

Overexploitation encourages extinction and is most likely to affect

A) large animals with low intrinsic reproductive rates.
B) edge-adapted species.
C) most organisms that live in the oceans.
D) terrestrial organisms more th

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12 years ago

Introduced species can have deleterious effects on biological communities by

Introduced species can have deleterious effects on biological communities by

A) competing with native species for space or breeding/nesting habitat.
B) competing with native species for food or light.
C) preying on native species

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12 years ago

This causes an increase in the intensity of UV radiation reaching Earth.

This causes an increase in the intensity of UV radiation reaching Earth.

A) acid precipitation
B) greenhouse effect
C) depletion of ozone layer
D) eutrophication
E) biological magnification

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12 years ago

This term refers to the reflecting and absorption of infrared radiation by atmos

This term refers to the reflecting and absorption of infrared radiation by atmospheric methane, carbon dioxide, and water.

A) eutrophication
B) acid precipitation
C) depletion of ozone layer
D) biological magnification

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12 years ago

This is caused by excessive nutrient runoff into aquatic ecosystems.

This is caused by excessive nutrient runoff into aquatic ecosystems.

A) greenhouse effect
B) acid precipitation
C) depletion of ozone layer
D) biological magnification
E) eutrophication

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12 years ago

Agricultural lands frequently require nutrient augmentation because

Agricultural lands frequently require nutrient augmentation because

A) grains raised for feeding livestock must be fortified, and thus require additional nutrients.
B) nitrogen-fixing bacteria are not as plentiful in ag

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12 years ago

Burning fossil fuels releases oxides of sulfur and nitrogen. These air pollutant

Burning fossil fuels releases oxides of sulfur and nitrogen. These air pollutants can be responsible for

A) precipitation with a pH as low as 3.0.
B) calcium deficiency in soils.
C) the death of fish in lakes.
D) direct dama

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12 years ago

This causes extremely high levels of toxic chemicals in fish-eating birds.

This causes extremely high levels of toxic chemicals in fish-eating birds.

A) greenhouse effect
B) acid precipitation
C) depletion of ozone layer
D) eutrophication
E) biological magnification

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12 years ago

Extinction is a natural phenomenon. It is estimated that 99% of all species that

Extinction is a natural phenomenon. It is estimated that 99% of all species that ever lived are now extinct. Why then do we say that we are now experiencing an extinction (loss of biodiversity) crisis?

A) Scientists have finally iden

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12 years ago

Suppose you attend a town meeting at which some experts tell the audience that t

Suppose you attend a town meeting at which some experts tell the audience that they have performed a cost-benefit analysis of a proposed transit system that would probably reduce overall air pollution and fossil fuel consumption. The analysis, howeve

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12 years ago

Which of the following is the most direct threat to biodiversity?

Which of the following is the most direct threat to biodiversity?

A) habitat destruction
B) overexploitation of selected species
C) the depletion of the ozone layer
D) increased levels of atmospheric carbon dioxide
E) z

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12 years ago

The most serious consequence of a decrease in global biodiversity would be the

The most serious consequence of a decrease in global biodiversity would be the

A) loss of source of genetic diversity to preserve endangered species.
B) increase in global warming and thinning of the ozone layer.
C) increase in

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12 years ago

We should care about loss in biodiversity in the populations of other species b

We should care about loss in biodiversity in the populations of other species because of

A) potential loss of genes, some of which may code for proteins useful to humans.
B) the risk to global ecological stability.
C) potential

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12 years ago

What term did E. O. Wilson coin for our innate appreciation of wild environment

What term did E. O. Wilson coin for our innate appreciation of wild environments and living organisms?

A) bioethics
B) biophobia
C) biophilia
D) bioremediation
E) landscape ecology

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12 years ago

To better comprehend the magnitude of current extinctions, it will be necessary

To better comprehend the magnitude of current extinctions, it will be necessary to

A) identify more of the yet unknown species of organisms on Earth.
B) differentiate between plant extinction and animal extinction numbers.
C) mon

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12 years ago

Which of the following is a consequence of biological magnification?

Which of the following is a consequence of biological magnification?

A) Toxic chemicals in the environment pose greater risk to top-level predators than to primary consumers.
B) Populations of top-level predators are generally smaller

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12 years ago

Which of the following nations has become a world leader in the establishment of

Which of the following nations has become a world leader in the establishment of zoned reserves?

A) China
B) Mexico
C) Costa Rica
D) Canada
E) United States

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12 years ago

Which of the following is consistent with forest fragmentation research?

Which of the following is consistent with forest fragmentation research?

A) Species diversity is always lower in fragmented forests when compared to forest interiors in the same region.
B) Productivity is the same in both fragmented f

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12 years ago

Cowbirds utilize fragmented forests effectively by

Cowbirds utilize fragmented forests effectively by

A) feeding on the fruits of shrubs that tend to grow at the forest/open-field interface.
B) roosting in forest trees, and nesting in grassy fields.
C) parasitizing

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12 years ago

Of the following statements about protected areas that have been established to

Of the following statements about protected areas that have been established to preserve biodiversity, which one is not correct?

A) National parks are one of many types of protected areas.
B) Management of a protected area should be c

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12 years ago

Which of the following strategies would most rapidly increase the genetic divers

Which of the following strategies would most rapidly increase the genetic diversity of a population in an extinction vortex?

A) Introduce new individuals transported from other populations of the same species.
B) Control populations o

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sarah!

12 years ago

The main cause of the increase in the amount of CO2 in Earth's atmosphere over t

The main cause of the increase in the amount of CO2 in Earth's atmosphere over the past 150 years is

A) an increase in the amount of infrared radiation absorbed by the atmosphere.
B) increased worldwide primary production

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sarah!

12 years ago

What is the single greatest threat to biodiversity?

What is the single greatest threat to biodiversity?

A) overharvesting of commercially important species
B) disruption of trophic relationships as more and more prey species become extinct
C) habitat alteration, fragmentation, and

ppk 15786 4 Replies

12 years ago

What is a critical load?

What is a critical load?

A) the level of a given toxin in an ecosystem that is lethal to 50% of the species present
B) the number of predators an ecosystem can support that effectively culls prey populations to healthy levels
C)

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12 years ago

Biodiversity hot spots are not necessarily the best choice for nature preserves

Biodiversity hot spots are not necessarily the best choice for nature preserves because

A) their ecological importance makes land purchase very expensive.
B) a hot spot for one group of organisms may not be a hot spot for another gro

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12 years ago

Island biogeography

Island biogeography theory attempts to explain the patterns of species richness and turnover on islands as a function of the size of the island and its distance from the mainland.

a. What are the basic tenets of this theory?

b.

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12 years ago

What specific population characteristics do demographers study?

What specific population characteristics do demographers study? Why is it important to study these things?

Jermain_ 7755 1 Reply

12 years ago

Explain human population growth in terms of carrying capacity.

Explain human population growth in terms of carrying capacity. How does this differ from organisms that exist in natural ecosystems? Explain how population growth for human populations is a problem.

Jermain_ 6427 1 Reply

chemb

12 years ago

Define ecological footprint and differentiate between the ecological footprint

Define ecological footprint and differentiate between the ecological footprint of a developing country and that of the United States. Support or challenge the following statement: "The population problem does not lie entirely with the developing

Jermain_ 5111 2 Replies

Jermain_

12 years ago

Why do environmentalists such as Paul Ehrlich view unchecked population growth

Why do environmentalists such as Paul Ehrlich view unchecked population growth as a problem?

Jermain_ 4213 1 Reply

12 years ago

Briefly explain how the status of women affects population growth.

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12 years ago

What social challenges are posed by a pyramid?shaped versus an inverted...

What social challenges are posed by a pyramid?shaped versus an inverted pyramid-shaped age structure diagram?

Jermain_ 4338 1 Reply

12 years ago

Population growth is at the root of many serious environmental problems.

Population growth is at the root of many serious environmental problems. From the ancient Babylonians thousands of years ago, to Thomas Malthus hundreds of years ago, to present day neo-Malthusians, humans seem to possess an awareness of Earth's

Jermain_ 5202 1 Reply

12 years ago

What three-factor model is used for representing the impact on environment?

What three-factor model is used for representing the impact on environment? What is a fourth factor that could be added to this? Give a simple explanation for each factor and describe what it means in terms of human impacts on the environment.

Jermain_ 4370 1 Reply

12 years ago

Boreal forest of Canada

In the boreal forest of Canada, wildfires are important disturbance factors. A single wild fire seldom burns the whole forest. Instead it burns large patches or stands and leaves others untouched. Following a wildfire in a black spruce forest, there

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