Question 1

Which of the following is NOT an indirect value of biodiversity in an ecosystem?

Accepted Answer

A)  biogeochemical cycling
B)  waste recycling
C)  water purification
D)  prevention of soil erosion
E)  All of the choices are roles played by biodiversity.F) A) and B)
G) B) and E)

Question 2

Which of the following statements concerning the indirect values of biodiversity is NOT correct?

Accepted Answer

A)  Trees take up carbon dioxide and release oxygen when they photosynthesize.
B)  Forests act like a giant sponge,soaking up excess water and releasing it during drier periods.
C)  If human impacts on the environment damage or destroy biogeochemical cycles,then technology will have to artificially re-create those cycles.
D)  Diverse organisms are critical in breaking down wastes and immobilizing pollutants.
E)  All of the choices are correct.F) B) and C)
G) A) and E)

Question 3

Approximately what percentage of the known biodiversity on Earth is composed of plants?

Accepted Answer

A)  16-19%
B)  50-55%
C)  12-15%
D)  63-67%
E)  6-8%F) C) and D)
G) B) and E)

Question 4

The identification and mitigation of factors causing habitat decline is known as

Accepted Answer

A)  the edge effect.
B)  a habitat restoration plan.
C)  a population viability analysis.
D)  a gap analysis.
E)  landscape dynamics.F) B) and D)
G) C) and D)

Question 5

Sustainable development is a pattern of resource use that attempts to preserve the environment while not considering the needs of humans in the present and future.

Accepted Answer

A) True 
 B)False  True

Question 6

Which of the following are characteristics of a keystone species?

Accepted Answer

A)  Their presence dictates the survival of the entire community.
B)  They evoke a strong emotional response in people.
C)  They have a very large population.
D)  They are most often mammals.
E)  None of these are characteristics of keystone species.F) C) and E)
G) B) and E)

Question 7

Researchers have identified several factors that have increased the number of threatened and endangered species.Identify the causes,as defined by the percentage (%)of species affected.
Use the following word bank: pollution,overexploitation,disease,exotic species,habitat loss.  A: ________
B: ________
C: ________
D: ________
E: ________

Accepted Answer

A: Habitat loss
B: ...

Question 8

As human civilization spread around the world,there were species that benefited greatly from new human-made habitats.However,generally with the expansion of human populations and agriculture,

Accepted Answer

A)  there has been an increase in biological diversity.
B)  levels of biological diversity have remained the same,with human-associated organisms replacing the few natural species displaced.
C)  biological diversity has decreased for a short time,rebounding to higher levels relatively quickly.
D)  biological diversity levels drop dramatically.E) A) and B)
F) A) and C)

Question 9

Species that are revered by humans due to their appearance or emotional ties are

Accepted Answer

A)  flagship species.
B)  keystone species.
C)  endangered species.
D)  threatened species.E) A) and B)
F) C) and D)

Question 10

Scientists estimate that at least 50-60% of all species now living will most likely become extinct in the next 20-50 years unless planned,coordinated action takes place.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following factors would make the strongest contribution to global climate change?

Accepted Answer

A)  large-scale deforestation
B)  disruption of the waste recycling by decomposers
C)  over-harvesting of wild species for consumptive value
D)  drainage of wetlands producing a disruption of water purification
E)  an increase in soil erosion leading to siltation of rivers and estuariesF) None of the above
G) A) and B)

Question 12

Which of the following are causes for extinction?

Accepted Answer

A)  habitat loss
B)  exotic species
C)  pollution
D)  All of these are causes for extinction.
E)  None of these are causes for extinction.F) None of the above
G) A) and B)

Question 13

What is the main reason that the field of conservation biology has developed?

Accepted Answer

A)  the current rates of extinction on Earth due to human-related factors
B)  humans looking for new methods of obtaining resources from the natural environment
C)  the consolidation of multiple fields of science into one in an attempt to be more efficient
D)  as a means of monitoring the stability of ecosystemsE) None of the above
F) A) and D)

Question 14

Identify the 5 main human influenced causes of extinction,starting with the cause with the greatest impact and moving towards the lowest impact.

Accepted Answer

Greatest impact - ha...

Question 15

Which of the following statements applies to an ecosystem with a high level of biodiversity?

Accepted Answer

A)  The ecosystem will have a higher rate of photosynthesis than a similar ecosystem with a lower biodiversity.
B)  Resource partitioning will occur more easily in an ecosystem that has a high level of biodiversity.
C)  The food web will be more complex and will have a greater number of connections within it.
D)  Areas of high biodiversity are economically more valuable than areas with limited biodiversity.
E)  All of these apply to an ecosystem with high biodiversity.F) A) and D)
G) B) and C)

Question 16

Introduction of alien or exotic species into new ecosystems can occur through

Accepted Answer

A)  colonization when new settlers arrive in an area.
B)  accidental transport by ship or plane without anyone's knowledge.
C)  agricultural and horticultural activities.
D)  All of the choices are correct.E) A) and B)
F) B) and C)

Question 17

The use of noncultivated fruit,animal skins,fiber,beeswax,and fish are examples of the ________ value of biodiversity.

Accepted Answer

A)  agricultural use
B)  medicinal use
C)  consumptive use
D)  contributions to the biogeochemical cyclesE) B) and D)
F) A) and B) C

Question 18

________ is when the number of individuals taken from a wild population is so great that the population becomes severely reduced in number.

Accepted Answer

A)  Overexploitation
B)  A source population
C)  An "edge effect"
D)  EutrophicationE) None of the above
F) B) and C) A

Question 19

Which of the following species is both a keystone species and a flagship species?

Accepted Answer

A)  grizzly bear
B)  panda
C)  beaver
D)  dolphin
E)  alligatorF) A) and B)
G) C) and E)

Question 20

Which of the following causes of extinction has not been attributed to human activity?

Accepted Answer

A)  exotic species
B)  habitat loss
C)  eutrophication
D)  increased carbon dioxide in the atmosphere
E)  All of the above.F) C) and D)
G) A) and B)

Exam 47: Conservation of Biodiversity

Which of the following is NOT an indirect value of biodiversity in an ecosystem?

Correct AnswerverifiedShow Answer

Which of the following statements concerning the indirect values of biodiversity is NOT correct?

Correct AnswerverifiedShow Answer

Approximately what percentage of the known biodiversity on Earth is composed of plants?

Correct AnswerverifiedShow Answer

The identification and mitigation of factors causing habitat decline is known as

Correct AnswerverifiedShow Answer

Sustainable development is a pattern of resource use that attempts to preserve the environment while not considering the needs of humans in the present and future.

Correct AnswerverifiedTrue

Which of the following are characteristics of a keystone species?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedA: Habitat loss B: ...View AnswerShow Answer

As human civilization spread around the world,there were species that benefited greatly from new human-made habitats.However,generally with the expansion of human populations and agriculture,

Correct AnswerverifiedShow Answer

Species that are revered by humans due to their appearance or emotional ties are

Correct AnswerverifiedShow Answer

Scientists estimate that at least 50-60% of all species now living will most likely become extinct in the next 20-50 years unless planned,coordinated action takes place.

Correct AnswerverifiedShow Answer

Which of the following factors would make the strongest contribution to global climate change?

Correct AnswerverifiedShow Answer

Which of the following are causes for extinction?

Correct AnswerverifiedShow Answer

What is the main reason that the field of conservation biology has developed?

Correct AnswerverifiedShow Answer

Identify the 5 main human influenced causes of extinction,starting with the cause with the greatest impact and moving towards the lowest impact.

Correct AnswerverifiedGreatest impact - ha...View AnswerShow Answer

Which of the following statements applies to an ecosystem with a high level of biodiversity?

Correct AnswerverifiedShow Answer

Introduction of alien or exotic species into new ecosystems can occur through

Correct AnswerverifiedShow Answer

The use of noncultivated fruit,animal skins,fiber,beeswax,and fish are examples of the ________ value of biodiversity.

Correct AnswerverifiedC

________ is when the number of individuals taken from a wild population is so great that the population becomes severely reduced in number.

Correct AnswerverifiedA

Which of the following species is both a keystone species and a flagship species?

Correct AnswerverifiedShow Answer

Which of the following causes of extinction has not been attributed to human activity?

Correct AnswerverifiedShow Answer

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True

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A: Habitat loss
B: ...
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Greatest impact - ha...
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C

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A

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