Question 1

Which of the following preservation tactics would have the greatest impact on saving the largest number of species?

Accepted Answer

A)  Preserve a large tract of land that contains source populations of keystone species.
B)  Preserve several small tracts of land that contain source populations of keystone species.
C)  Preserve a large tract of land that contains sink populations of keystone species.
D)  Preserve a large tract of land that contains source populations of flagship species.
E)  Preserve multiple small tracts of land that each contain source populations of keystone species.F) A) and D)
G) A) and C)

Question 2

As "civilization" spread around the world,several species benefitted greatly from new human-made habitats,including the house fly,the Norwegian rat,and many crop plants.Generally,with expansion of human populations and agriculture,

Accepted Answer

A)  there has been an increase in biological diversity.
B)  biological diversity has remained the same,with human-associated organisms replacing the few natural species displaced.
C)  biological diversity has decreased but mainly with the elimination of pests by humans.
D)  biological diversity is decreasing at an accelerating rate with the elimination of many unstudied species.E) None of the above
F) B) and C)

Question 3

Sustainable development is a pattern of resource use that attempts to preserve the environment while meeting the needs of humans in the present and future.

Accepted Answer

A) True 
 B)False

Question 4

What is the correct sequence of events that has led to the decimation of the kelp beds along the west coast of the U.S.? 
A.Sea otters decline in numbers
B.Increase in orca predation on sea otters
C.Decline in the seals and sea otters
D.Over fishing of the herring and perch
E.Increase in the sea urchin population

Accepted Answer

A)  d - c - b - a - e
B)  d - c - b - e - a
C)  a - d - c - b - e
D)  d - b - c - a - e
E)  b - d - c - a - eF) C) and D)
G) A) and B)

Question 5

Which of the following is not a human induced cause of extinction?

Accepted Answer

A)  exotic species
B)  habitat loss
C)  eutrophication
D)  ozone depletion
E)  outcompeted by another species in the same ecosystemF) A) and E)
G) A) and D)

Question 6

Which of the following statements about keystone species is NOT true?

Accepted Answer

A)  The extinction of keystone species can lead to other extinctions and a loss of biodiversity.
B)  Keystone species are defined as a population subdivided into several small isolated populations due to habitat fragmentation.
C)  Examples of keystone species are grizzly bears,bats,beavers and alligators.
D)  The numbers of individuals in the keystone species in their respective community may or may not be excessively high.E) All of the above
F) B) and D)

Question 7

If all of the endangered species in the United States were to go extinct the Earth's biodiversity would decrease by _________.

Accepted Answer

A)  approximately .007%
B)  approximately 2.3%
C)  approximately 10%
D)  approximately 3.4%
E)  approximately 16.2%F) A) and E)
G) A) and C)

Question 8

A decrease in the over fishing of herring and perch would have prevented the decimation of the kelp beds along the west coast of the U.S..

Accepted Answer

A) True 
 B)False

Question 9

Which of the following statements about biological diversity is NOT true?

Accepted Answer

A)  Scientists estimate that 10-50 million species exist.
B)  Biodiversity is described in terms of genetic,community,and landscape diversity.
C)  Biodiversity refers to the variety of life on Earth.
D)  Biodiversity is evenly distributed throughout the biosphere.
E)  Many species that are in danger of extinction have not been identified and studied.F) A) and C)
G) C) and D)

Question 10

As the producer biodiversity doubles what will happen to the rate of photosynthesis?

Accepted Answer

A)  It will double.
B)  It will decrease by 50%.
C)  It will increase by .1 - .2.
D)  It will increase by .5 - .8.
E)  It will decrease by .2 - .4.F) A) and B)
G) C) and D)

Question 11

Which of the following are characteristics of a keystone species?

Accepted Answer

A)  They influence the diversity of the community.
B)  They evoke an emotional response in people.
C)  They have a very large population.
D)  They are always mammals.
E)  None of these are characteristics of keystone species.F) A) and B)
G) A) and C)

Question 12

What was the root cause of the decimation of the kelp beds along the west coast of the U.S.?

Accepted Answer

A)  Over fishing of the perch and herring in the area.
B)  A decline in the sea otter population that would control the sea urchin population.
C)  An increase in the orca population preying upon the sea otters.
D)  An explosion of the sea urchin population.
E)  A decline in the seal and sea otter population.F) A) and B)
G) D) and E)

Question 13

Forests and other ecosystems may decrease the chances of flooding in an area due to their water-holding capacity.

Accepted Answer

A) True 
 B)False

Question 14

What is the primary goal of conservation biology?

Accepted Answer

A)  Management of the Earth's biodiversity.
B)  Discovery of new sources of food and medicines.
C)  Preservation of crucial habitat for the benefit of multiple species.
D)  Balance the needs of the human population against the rest of the species on Earth.
E)  Identify the most endangered and threatened species so efforts can be made to protect them.F) C) and D)
G) C) and E)

Question 15

_______ 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 occurs
B)  A source population is formed
C)  An "edge effect" occurs
D)  Eutrophication occursE) B) and C)
F) None of the above

Question 16

Which of the following is not a role played by biodiversity within 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 E)
G) B) and E)

Question 17

Which value of biodiversity in an ecosystem will benefit endangered species the most?

Accepted Answer

A)  consumptive value
B)  medicinal value
C)  ecotourism
D)  agricultural value
E)  regulation of climateF) A) and E)
G) A) and D)

Question 18

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

Accepted Answer

A)  18 - 20%
B)  50 - 55%
C)  12- 15%
D)  63 - 67%
E)  6 - 8%F) C) and D)
G) A) and B)

Question 19

Biodiversity is a resource of immense value.All of the following are ways in which biodiversity is directly valuable to humans EXCEPT

Accepted Answer

A)  agricultural.
B)  medicinal.
C)  consumptive use.
D)  contributions to biogeochemical cycles.E) None of the above
F) A) and D)

Question 20

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) A) and D)
F) A) and C)

Exam 47: Conservation of Biodiversity

If all of the endangered species in the United States were to go extinct the Earth's biodiversity would decrease by _________.

Correct Answer
verified

What is the primary goal of conservation biology?

Correct Answer
verified

A decrease in the over fishing of herring and perch would have prevented the decimation of the kelp beds along the west coast of the U.S..

Correct Answer
verified

Which of the following is not a human induced cause of extinction?

Correct Answer
verified

As "civilization" spread around the world,several species benefitted greatly from new human-made habitats,including the house fly,the Norwegian rat,and many crop plants.Generally,with expansion of human populations and agriculture,

Correct Answer
verified

Biodiversity is a resource of immense value.All of the following are ways in which biodiversity is directly valuable to humans EXCEPT

Correct Answer
verified

Which of the following statements about keystone species is NOT true?

Correct Answer
verified

As the producer biodiversity doubles what will happen to the rate of photosynthesis?

Correct Answer
verified

Which value of biodiversity in an ecosystem will benefit endangered species the most?

Correct Answer
verified

Which of the following statements about biological diversity is NOT true?

Correct Answer
verified

Forests and other ecosystems may decrease the chances of flooding in an area due to their water-holding capacity.

Correct Answer
verified

What was the root cause of the decimation of the kelp beds along the west coast of the U.S.?

Correct Answer
verified

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

Correct Answer
verified

Sustainable development is a pattern of resource use that attempts to preserve the environment while meeting the needs of humans in the present and future.

Correct Answer
verified

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

Correct Answer
verified

Which of the following is not a role played by biodiversity within an ecosystem?

Correct Answer
verified

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

Correct Answer
verified

Which of the following are characteristics of a keystone species?

Correct Answer
verified

Correct Answer
verified

Which of the following preservation tactics would have the greatest impact on saving the largest number of species?

Correct Answer
verified

Exam 47: Conservation of Biodiversity

If all of the endangered species in the United States were to go extinct the Earth's biodiversity would decrease by _________.

Correct AnswerverifiedShow Answer

What is the primary goal of conservation biology?

Correct AnswerverifiedShow Answer

A decrease in the over fishing of herring and perch would have prevented the decimation of the kelp beds along the west coast of the U.S..

Correct AnswerverifiedShow Answer

Which of the following is not a human induced cause of extinction?

Correct AnswerverifiedShow Answer

As "civilization" spread around the world,several species benefitted greatly from new human-made habitats,including the house fly,the Norwegian rat,and many crop plants.Generally,with expansion of human populations and agriculture,

Correct AnswerverifiedShow Answer

Biodiversity is a resource of immense value.All of the following are ways in which biodiversity is directly valuable to humans EXCEPT

Correct AnswerverifiedShow Answer

Which of the following statements about keystone species is NOT true?

Correct AnswerverifiedShow Answer

As the producer biodiversity doubles what will happen to the rate of photosynthesis?

Correct AnswerverifiedShow Answer

Which value of biodiversity in an ecosystem will benefit endangered species the most?

Correct AnswerverifiedShow Answer

Which of the following statements about biological diversity is NOT true?

Correct AnswerverifiedShow Answer

Forests and other ecosystems may decrease the chances of flooding in an area due to their water-holding capacity.

Correct AnswerverifiedShow Answer

What was the root cause of the decimation of the kelp beds along the west coast of the U.S.?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Sustainable development is a pattern of resource use that attempts to preserve the environment while meeting the needs of humans in the present and future.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is not a role played by biodiversity within an ecosystem?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following are characteristics of a keystone species?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following preservation tactics would have the greatest impact on saving the largest number of species?

Correct AnswerverifiedShow Answer

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