Question 1

Geographic biodiversity "hot spots" are those areas with

Accepted Answer

A)   the widest variety of plant species in three or more ecosystems.
B)   the greatest number of species in the greatest area of land or water.
C)   the greatest land mass.
D)   at least 1500 endemic plant species and that have lost at least 70% of the original habitat.
E)   the greatest number of species and cycles.F) C) and D)
G) A) and B)

Question 2

The main causes of species extinction include all of the following EXCEPT

Accepted Answer

A)   direct exploitation.
B)   introduced species.
C)   introgression.
D)   habitat destruction.
E)   climate change.F) C) and D)
G) A) and B)

Question 3

According to the rivet hypothesis:

Accepted Answer

A)   Genetic diversity holds together an ecosystem.
B)   Any species loss will have major consequences for ecosystem processes.
C)   The loss of a few species from an ecosystem could probably be tolerated.
D)   Ecosystems are resilient to extinctions.
E)   None of these choices are correct.F) All of the above
G) A) and C)

Question 4

In the Ecotron experiments of Shahid Naeem comparing species diversity and ecosystem function, it was found that a larger ground cover also meant

Accepted Answer

A)   higher nutrient uptake by animals in the system.
B)   a larger plant biomass and greater community productivity.
C)   more individual plants from fewer plant species.
D)   ecosystem function depends only available light intensity.
E)   genetic, species, and ecosystem attributes are tightly linked.F) All of the above
G) D) and E)

Question 5

Which of these is NOT a focus of habitat conservation?

Accepted Answer

A)   identifying representative habitats
B)   identifying countries rich in species
C)   identifying areas rich in endemics
D)   identifying areas of rich farm land
E)   identifying areas rich in endemics and identifying representative habitatsF) A) and E)
G) B) and D)

Question 6

The number of extinctions of birds and mammals has gone up as human populations have increased.

Accepted Answer

A) True 
 B)False

Question 7

Species within a community that have a role out of proportion with their abundance are called

Accepted Answer

A)   indicator species.
B)   SLOSS species.
C)   keystone species.
D)   dominant species.
E)   umbrella species.F) A) and B)
G) B) and C)

Question 8

Species whose habitat requirements are so large that protecting them would mean protecting many other species in the same habitat are called

Accepted Answer

A)   indicator species.
B)   keystone species.
C)   endemic species.
D)   flagship species.
E)   umbrella species.F) C) and E)
G) B) and C)

Question 9

A smaller percentage of bird than fish species are endangered.

Accepted Answer

A) True 
 B)False

Question 10

Cloning endangered species

Accepted Answer

A)   is expensive.
B)   is rarely practical.
C)   needs surrogate mothers.
D)   does not address the root cause of species loss.
E)   All of these choices are correct.F) None of the above
G) A) and E) E

Question 11

Both rare and common insect species may have economic value.

Accepted Answer

A) True 
 B)False

Question 12

Spotted owls are keystone species.

Accepted Answer

A) True 
 B)False

Question 13

SLOSS stands for single large or several small.

Accepted Answer

A) True 
 B)False

Question 14

Threatened species

Accepted Answer

A)   are rare species with unregulated hunting seasons.
B)   are species likely to become endangered in the future.
C)   are species likely to become endangered in the future and are in danger of extinction throughout all . or a significant portion of their range.
D)   are confined to plants.
E)   are in danger of extinction throughout all or a significant portion of their range and are confined to plants.F) B) and D)
G) A) and C)

Question 15

One of the leading causes of the extinction of species in the United States has been

Accepted Answer

A)   climate change.
B)   inbreeding.
C)   deforestation.
D)   invasive species.
E)   soil erosion.F) B) and D)
G) D) and E)

Question 16

The decline in the reproduction and survival of individuals in small populations is known as the

Accepted Answer

A)   extinction vortex.
B)   Wilson effect.
C)   effective population size.
D)   Allee effect.
E)   None of these choices are correct.F) C) and D)
G) A) and D) D

Question 17

Endangered species

Accepted Answer

A)   have become extinct.
B)   are those species likely to become in danger of extinction in the future.
C)   are only found in the tropics.
D)   are only animals.
E)   are in danger of extinction throughout all or a significant portion of their range.F) A) and B)
G) B) and C)

Question 18

Field experiments by David Tilman showed that increased plant diversity reduced the severity of attack by foliar fungal diseases.

Accepted Answer

A) True 
 B)False  True

Question 19

According to the redundancy hypothesis, species are redundant if

Accepted Answer

A)   they could be eliminated or replaced by others with no loss of function and we have named them wrongly.
B)   there is an excess of species.
C)   we have named them wrongly.
D)   only one species is necessary at each trophic level.
E)   they could be eliminated or replaced by others with no loss of function.F) C) and E)
G) A) and D)

Question 20

Inbreeding and small population size of a threatened species can combine to form a downward spiral for the species known as a(n)

Accepted Answer

A)   extinction vortex.
B)   random change of allele frequencies attributable to chance.
C)   random mutation.
D)   accelerated evolution of new traits.
E)   None of the possibilities are correct.F) B) and D)
G) C) and D)

Exam 60: Biodiversity and Conservation Biology

Geographic biodiversity "hot spots" are those areas with

Correct AnswerverifiedShow Answer

The main causes of species extinction include all of the following EXCEPT

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According to the rivet hypothesis:

Correct AnswerverifiedShow Answer

In the Ecotron experiments of Shahid Naeem comparing species diversity and ecosystem function, it was found that a larger ground cover also meant

Correct AnswerverifiedShow Answer

Which of these is NOT a focus of habitat conservation?

Correct AnswerverifiedShow Answer

The number of extinctions of birds and mammals has gone up as human populations have increased.

Correct AnswerverifiedShow Answer

Species within a community that have a role out of proportion with their abundance are called

Correct AnswerverifiedShow Answer

Species whose habitat requirements are so large that protecting them would mean protecting many other species in the same habitat are called

Correct AnswerverifiedShow Answer

A smaller percentage of bird than fish species are endangered.

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Cloning endangered species

Correct AnswerverifiedE

Both rare and common insect species may have economic value.

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Spotted owls are keystone species.

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SLOSS stands for single large or several small.

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Threatened species

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One of the leading causes of the extinction of species in the United States has been

Correct AnswerverifiedShow Answer

The decline in the reproduction and survival of individuals in small populations is known as the

Correct AnswerverifiedD

Endangered species

Correct AnswerverifiedShow Answer

Field experiments by David Tilman showed that increased plant diversity reduced the severity of attack by foliar fungal diseases.

Correct AnswerverifiedTrue

According to the redundancy hypothesis, species are redundant if

Correct AnswerverifiedShow Answer

Inbreeding and small population size of a threatened species can combine to form a downward spiral for the species known as a(n)

Correct AnswerverifiedShow Answer

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E

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D

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True

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