Question 1

The situation with major oceanic fishing areas is

Accepted Answer

A)   good, since the oceans are so large, they are the one remaining natural ecosystem that is not susceptible to extinction.
B)   generally positive, with only one or two of the 15 major oceanic fishing areas over-exploited.
C)   generally negative, with 11 of the 15 major oceanic fishing areas overexploited.
D)   positive for the bottom dwellers that are protected but negative for the schools of swimming fish.
E)   negative for the bottom dwellers that are over-fished by trawling but positive for the schools of swimming fish that can easily get away.F) A) and B)
G) C) and E)

Question 2

Conservation biology is a field that relies on multiple other disciplines to support it.

Accepted Answer

A) True 
 B)False

Question 3

Rosy periwinkle, the nine-banded armadillo, and some species of fungus and bacteria have _________ value to man.

Accepted Answer

A)   agricultural
B)   medicinal
C)   consumptive use
D)   indirect
E)   noF) D) and E)
G) B) and C)

Question 4

Introduction of alien or exotic species into new ecosystems occurs by

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 D)
F) All of the above

Question 5

Which of the following statements about extinction is TRUE?

Accepted Answer

A)   Overexploitation by hunting and fishing is the major threat to tropical animals and plants.
B)   Without human activity, all species would survive and there would be no extinctions.
C)   Endangered wild species often become extinct due to different combinations of factors.
D)   Commercial hunting and fishing are careful not to deplete animal reserves.
E)   Introduction of new exotic species helps preserve biodiversity and slow extinction.F) A) and E)
G) D) and E)

Question 6

_______ 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) None of the above
F) A) and B)

Question 7

Rabbits were introduced to Australia by pioneer settlers in the mid 1800s for sporting hunters. They have since stressed native marsupial and plant populations. This is an example of the introduction of exotic species through accidental transport.

Accepted Answer

A) True 
 B)False

Question 8

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) C) and E)
G) None of the above

Question 9

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) B) and E)

Question 10

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 11

Conservation biology supports all of the following ethical principles EXCEPT

Accepted Answer

A)   biodiversity is desirable for the biosphere and humans.
B)   all animals have the same rights or legal status as humans.
C)   biodiversity has value in and of itself regardless of any practical human benefits.
D)   extinctions due to human actions are undesirable.
E)   the complex interactions of ecosystems support biodiversity and are desirable.F) C) and D)
G) A) and D)

Question 12

Animals 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) B) and D)
F) B) and C)

Question 13

Why is there great value in preserving biodiversity hotspots?

Accepted Answer

A)   These spots have a large diversity of species in them.
B)   Preserved hotspots have a direct value to humans.
C)   Hotspots have an indirect value to humans.
D)   Biodiversity hotspots are a source of new medicines.
E)   All of these are values in preserving biodiversity hotspots.F) B) and E)
G) C) and E)

Question 14

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) B) and C)
G) C) and E)

Question 15

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) A) and B)
G) All of the above

Question 16

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) C) and D)
G) B) and D)

Question 17

Which of the following fields of study provide useful information for making decisions about conservation?

Accepted Answer

A)   agronomy
B)   veterinary science
C)   genetics
D)   physiology
E)   All of these fields provide useful information for making decisions about conservation.F) A) and B)
G) B) and E)

Question 18

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 19

Preliminary studies indicate that biodiversity maximizes resource acquisition and retention within an ecosystem.

Accepted Answer

A) True 
 B)False

Question 20

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) None of the above
F) B) and C)

Exam 47: Conservation of Biodiversity

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 Answer
verified

Rabbits were introduced to Australia by pioneer settlers in the mid 1800s for sporting hunters. They have since stressed native marsupial and plant populations. This is an example of the introduction of exotic species through accidental transport.

Correct Answer
verified

Why is there great value in preserving biodiversity hotspots?

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

Which of the following fields of study provide useful information for making decisions about conservation?

Correct Answer
verified

Conservation biology supports all of the following ethical principles EXCEPT

Correct Answer
verified

The situation with major oceanic fishing areas is

Correct Answer
verified

Which of the following statements about extinction is TRUE?

Correct Answer
verified

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

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

Rosy periwinkle, the nine-banded armadillo, and some species of fungus and bacteria have _________ value to man.

Correct Answer
verified

Correct Answer
verified

Preliminary studies indicate that biodiversity maximizes resource acquisition and retention within an ecosystem.

Correct Answer
verified

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

Correct Answer
verified

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

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

Conservation biology is a field that relies on multiple other disciplines to support it.

Correct Answer
verified

Introduction of alien or exotic species into new ecosystems occurs by

Correct Answer
verified

Which of the following are causes for extinction?

Correct Answer
verified

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

Correct Answer
verified

Exam 47: Conservation of Biodiversity

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

Rabbits were introduced to Australia by pioneer settlers in the mid 1800s for sporting hunters. They have since stressed native marsupial and plant populations. This is an example of the introduction of exotic species through accidental transport.

Correct AnswerverifiedShow Answer

Why is there great value in preserving biodiversity hotspots?

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

Which of the following fields of study provide useful information for making decisions about conservation?

Correct AnswerverifiedShow Answer

Conservation biology supports all of the following ethical principles EXCEPT

Correct AnswerverifiedShow Answer

The situation with major oceanic fishing areas is

Correct AnswerverifiedShow Answer

Which of the following statements about extinction is TRUE?

Correct AnswerverifiedShow Answer

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

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

Rosy periwinkle, the nine-banded armadillo, and some species of fungus and bacteria have _________ value to man.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Preliminary studies indicate that biodiversity maximizes resource acquisition and retention within an ecosystem.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

Conservation biology is a field that relies on multiple other disciplines to support it.

Correct AnswerverifiedShow Answer

Introduction of alien or exotic species into new ecosystems occurs by

Correct AnswerverifiedShow Answer

Which of the following are causes for extinction?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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