Environmental and Conservation Biology

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

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

biolove

Which of the following ecological locations has the greatest species diversity?

Which of the following ecological locations has the greatest species diversity?

Which of the following ecological locations has the greatest species diversity?

A) islands
B) tundra
C) deciduous forests
D) grasslands
E) tropics

ppk   4910   1 Reply

anon

Estimates of current rates of extinction

Estimates of current rates of extinction

Estimates of current rates of extinction 

A) suggest that rates of extinction have decreased globally.
B) suggest that one-half of all animal and plant species may be gone by the year 2100.
C) indicate that we have reached

ppk   2725   1 Reply

mrjohnston

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

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

ppk   2145   1 Reply

mrjohnston

Which of the following provides the best evidence of a biodiversity crisis?

Which of the following provides the best evidence of a biodiversity crisis?

Which of the following provides the best evidence of a biodiversity crisis?

A) the incursion of a non-native species
B) increasing pollution levels
C) climate change
D) decrease in regional productivity
E) high rate of

ppk   2244   1 Reply

mrjohnston

Although extinction is a natural process, current extinctions are of concern to

Although extinction is a natural process, current extinctions are of concern to

Although extinction is a natural process, current extinctions are of concern to environmentalists because

A) the rate of extinction is unusually high.
B) more animals than ever before are going extinct.
C) current extinction is p

ppk   2500   1 Reply

mrjohnston

Which of the following terms includes all of the others?

Which of the following terms includes all of the others?

Which of the following terms includes all of the others?

A) species diversity
B) species richness
C) genetic diversity
D) ecosystem diversity
E) biodiversity

ppk   3776   1 Reply

mrjohnston

Which of the following groups is most threatened by global extinctions?

Which of the following groups is most threatened by global extinctions?

Which of the following groups is most threatened by global extinctions?

A) fish      B) plants      C) amphibians      D) birds      E) mammals

ppk   1967   1 Reply

bio_man

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 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

ppk   2962   1 Reply

bio_man

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 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

ppk   2414   1 Reply

bio_man

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 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

ppk   1685   1 Reply

bio_man

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

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

ppk   3074   1 Reply

bio_man

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

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

ppk   2959   1 Reply

bio_man

According to most conservation biologists, the single greatest threat to global

According to most conservation biologists, the single greatest threat to global

According to most conservation biologists, the single greatest threat to global biodiversity is

A) stratospheric ozone depletion.
B) global climate change resulting from a variety of human activities.
C) alteration or destruction

ppk   3318   1 Reply

bio_man

What is the biological significance of genetic diversity between populations?

What is the biological significance of genetic diversity between populations?

What is the biological significance of genetic diversity between populations?

A) Diseases and parasites are not spread between separated populations.
B) Genes for adaptive traits to local conditions make microevolution possible.

ppk   3130   1 Reply

mrjohnston

Introduced species can have deleterious effects on biological communities by

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

ppk   2512   1 Reply

mrjohnston

Overexploitation encourages extinction and is most likely to affect

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

ppk   2793   1 Reply

mrjohnston

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" 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

ppk   2450   1 Reply

mrjohnston

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

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.

ppk   2318   1 Reply

mrjohnston

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?

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

mrjohnston

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

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

ppk   2963   1 Reply

mrjohnston

Which of the following examples poses the greatest potential threat to biodivers

Which of the following examples poses the greatest potential threat to biodivers

Which of the following examples poses the greatest potential threat to biodiversity?

A) releasing sterilized rainbow trout to boost the sport fishing of a river system that contains native brook trout
B) allowing previously used farm

ppk   2345   1 Reply

mrjohnston

Which of the following is a type of research in which a conservation biologist w

Which of the following is a type of research in which a conservation biologist w

Which of the following is a type of research in which a conservation biologist would be involved?

A) studying species diversity and interaction in the Florida Everglades, past and present
B) reestablishing whooping cranes in their for

ppk   2587   1 Reply

bio_man

Which of the following conditions is the most likely indicator of a population i

Which of the following conditions is the most likely indicator of a population i

Which of the following conditions is the most likely indicator of a population in an extinction vortex? 

A) The species in question is found only in small pockets of its former range.
B) The population is geographically divided

ppk   1686   1 Reply

Jeffrey

According to the small-population approach, what would be the best strategy for

According to the small-population approach, what would be the best strategy for

According to the small-population approach, what would be the best strategy for saving a population that is in an extinction vortex?

A) introducing individuals from other populations to increase genetic variation
B) determining the m

ppk   1422   1 Reply

Jeffrey

Review the formula for effective population size. Imagine a population of 1,000

Review the formula for effective population size. Imagine a population of 1,000

Review the formula for effective population size. Imagine a population of 1,000 small rodents. Of these, 300 are breeding females, 300 are breeding males, and 400 are nonbreeding juveniles. What is the effective population size?   

A)

ppk   3080   1 Reply

Jeffrey

If the sex ratio in a population is significantly different from 50:50, then whi

If the sex ratio in a population is significantly different from 50:50, then whi

If the sex ratio in a population is significantly different from 50:50, then which of the following will always be true?

A) The genetic variation in the population will increase over time.
B) The genetic variation in the population wi

ppk   3146   1 Reply

Jeffrey

Modern conservation biology increasingly aims at

Modern conservation biology increasingly aims at

Modern conservation biology increasingly aims at

A) lobbying for strict enforcement of the U.S. Endangered Species Act.
B) sustaining biodiversity of entire ecosystems and communities.
C) saving as much habitat as possible from d

ppk   3366   1 Reply

bio_man

The word triage originated during World War I and was first used by French docto

The word triage originated during World War I and was first used by French docto

The word triage originated during World War I and was first used by French doctors in prioritizing patients based on the severity of their wounds, because there were more wounded soldiers in need of urgent care than there were resources to treat them

ppk   1947   1 Reply

bio_man

Which of the following species was driven to extinction by overexploitation by h

Which of the following species was driven to extinction by overexploitation by h

Which of the following species was driven to extinction by overexploitation by hunters/fishermen?  

A) American bison
B) North American bluefin tuna
C) flying foxes
D) the great auk
E) African elephant

ppk   2016   1 Reply

mrjohnston

The primary difference between the small-population approach (S-PA) and the decl

The primary difference between the small-population approach (S-PA) and the decl

The primary difference between the small-population approach (S-PA) and the declining-population approach (D-PA) to biodiversity recovery is 

A) S-PA is interested in bolstering the genetic diversity of a threatened population rather

ppk   3284   1 Reply

bio_man

The long-term problem with red-cockaded woodpecker habitat intervention in the s

The long-term problem with red-cockaded woodpecker habitat intervention in the s

The long-term problem with red-cockaded woodpecker habitat intervention in the southwest United States is

A) what habitat remains for the red-cockaded woodpecker does not contain trees suitable for nest-cavity construction.
B) the on

ppk   2404   1 Reply

mrjohnston

Managing southwestern forests specifically for the red-cockaded woodpecker

Managing southwestern forests specifically for the red-cockaded woodpecker

Managing southwestern forests specifically for the red-cockaded woodpecker

A) involved strict fire suppression measures.
B) caused other species of songbird to decline.
C) contributed to greater abundance and diversity of other f

ppk   1514   1 Reply

mrjohnston

Which of the following is true about the current research regarding forest fragm

Which of the following is true about the current research regarding forest fragm

Which of the following is true about the current research regarding forest fragmentation?

A) Fragmented forests are the goal of conservation biologists who design wildlife preserves.
B) Fragmented forests support a lesser biodiversity

ppk   1775   1 Reply

mrjohnston

Relatively small geographic areas with high concentrations of endemic species an

Relatively small geographic areas with high concentrations of endemic species an

Relatively small geographic areas with high concentrations of endemic species and a large number of endangered and threatened species are known as

A) bottlenecks.
B) critical communities.
C) endemic metapopulations.
D) ende

ppk   2551   1 Reply

mrjohnston

How is habitat fragmentation related to biodiversity loss?

How is habitat fragmentation related to biodiversity loss?

How is habitat fragmentation related to biodiversity loss?

A) In fragmented habitats, more soil erosion takes place.
B) Populations of organisms in fragments are smaller and, thus, more susceptible to extinction.
C) Animals are f

ppk   4711   1 Reply

mrjohnston

Cowbirds utilize fragmented forests effectively by

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

ppk   1243   1 Reply

duddy

Which of the following is consistent with forest fragmentation research?

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

ppk   1108   1 Reply

duddy

How are movement corridors potentially harmful to certain species?

How are movement corridors potentially harmful to certain species?

How are movement corridors potentially harmful to certain species?

A) They increase inbreeding.
B) They promote dispersion.
C) They spread disease and parasites.
D) They allow seasonal migration.
E) They increase genet

ppk   2149   1 Reply

bio_man

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

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

ppk   2890   1 Reply

bio_man