Question 1

The goal of the Endangered Species Act is to protect

Accepted Answer

A)   broad categories of ecosystems.
B)   key species which are particularly important for normal ecosystem function.
C)   all species, regardless of their direct usefulness to humans.
D)   species providing commodities important to humans.

Question 2

A species in imminent danger of extinction is classified by the U.S. Endangered Species Act as

Accepted Answer

A)   Vulnerable
B)   Threatened
C)   Valuable
D)   Endangered
E)   At risk

Question 3

Approximately how many species have been identified on Earth?

Accepted Answer

A)   About 500,000
B)   A little less than 1 million
C)   A little more than 1.7 million
D)   A little more than 3 million
E)   About 30 million

Question 4

Because prairie dogs have a major effect on the ecological functioning of their habitat and the health of other members of their community, they are considered to be

Accepted Answer

A)   an indicator species.
B)   an umbrella species.
C)   a keystone species.
D)   a flagship species.

Question 5

Most of the species that are yet undiscovered are probably

Accepted Answer

A)   Mammals and reptiles
B)   Birds and fish
C)   Vertebrates
D)   Invertebrates
E)   Multicellular plants

Question 6

Which of the following would be a characteristic of an exotic plant species?

Accepted Answer

A)   Produces a few seeds after many years to reach maturity
B)   Is a specialist, for example, has a low range of tolerance for soil acidity
C)   Is an opportunist that is desired by humans for food or ornamental value
D)   Has many predators and diseases
E)   Is a secondary consumer (trophic levels)

Question 7

Species diversity in a community is an important factor in ecological resilience after a drought.

Accepted Answer

A) True 
 B)False  True

Question 8

Soil formation and water purification are examples of _________ based on the biodiversity that benefit humans.

Accepted Answer

A)   Aesthetic benefits
B)   Geological cycles
C)   Availability of food
D)   Health benefits
E)   Ecological services

Question 9

The objective of a species recovery plan is to

Accepted Answer

A)   Interbreed threatened species with common species
B)   Increase an endangered species population until it is no longer endangered
C)   Invest corporate capital in species maintenance
D)   Study the species for a better understanding of its role in the biological community
E)   Protect the species to aid other organisms and resources in the ecosystem

Question 10

Where will you find the greatest concentration of different species?

Accepted Answer

A)   the tropics
B)   Siberia
C)   Europe
D)   the poles

Question 11

A species that is naturally rare or that has been depleted to dangerous levels is known, according to the Endangered Species Act, as a(n)  ________ species.

Accepted Answer

A)   Endangered
B)   Threatened
C)   Unusual
D)   Vulnerable
E)   At risk

Question 12

Zoo animals in the U.S. today come mainly from the wild.

Accepted Answer

A) True 
 B)False

Question 13

Ecological diversity

Accepted Answer

A)   refers to the richness and complexity of a biological community.
B)   is more important to conservation than genetic diversity.
C)   refers to the various types of ecosystems on earth.
D)   refers to the different kinds of species present in an ecosystem.

Question 14

Which of the following fish is safe and environmentally friendly to eat?

Accepted Answer

A)   Swordfish
B)   Wild salmon
C)   Albacore tuna
D)   Yellowfin tuna
E)   Haddock

Question 15

What do Eurasian milfoil, kudzu vine and the emerald ash borer have in common?

Accepted Answer

A)   They are all in danger of extinction in their native habitats
B)   They offer exciting prospects as potential sources of new drugs
C)   They are exotic species wreaking havoc in the ecosystems into which they have been introduced
D)   They offer promise as agents of biological control for pest species

Question 16

The pharmaceutical industry has an interest in preventing species extinction because

Accepted Answer

A)   People are healthier in a healthy environment.
B)   Undiscovered species may provide lucrative new drugs.
C)   Most taxonomists are drug makers.
D)   It wants to increase diversity in North America.
E)   They see the benefits of eco-design.

Question 17

Ecological diversity is a measure of the number of

Accepted Answer

A)   Different kinds of organisms within a community or ecosystem
B)   Different versions of the same gene in an ecological community
C)   Sizes, colors, and shapes of organisms within an ecological community
D)   Niches, trophic levels, and ecological processes of a biological community
E)   Different species in an ecosystem D

Question 18

Invasive (exotic)  species tend to __________ the balance of ecosystems and ______ biodiversity.

Accepted Answer

A)   Increase; decrease
B)   Increase; enhance
C)   Maintain; enhance
D)   Upset; decrease
E)   Upset; increase

Question 19

Name at least three invasive species that live in your area. What are some of the problems they are causing? Is anything being done to control these species?

Accepted Answer

Will vary ...

Question 20

Flagship species

Accepted Answer

A)   are especially interesting and attractive and are used by conservation organizations to motivate people.
B)   is a term that refers to the largest species of a community.
C)   are species whose presence is tied to specific environmental conditions. A

Exam 11: Biodiversity: Preserving Species

The goal of the Endangered Species Act is to protect

Correct AnswerverifiedShow Answer

A species in imminent danger of extinction is classified by the U.S. Endangered Species Act as

Correct AnswerverifiedShow Answer

Approximately how many species have been identified on Earth?

Correct AnswerverifiedShow Answer

Because prairie dogs have a major effect on the ecological functioning of their habitat and the health of other members of their community, they are considered to be

Correct AnswerverifiedShow Answer

Most of the species that are yet undiscovered are probably

Correct AnswerverifiedShow Answer

Which of the following would be a characteristic of an exotic plant species?

Correct AnswerverifiedShow Answer

Species diversity in a community is an important factor in ecological resilience after a drought.

Correct AnswerverifiedTrue

Soil formation and water purification are examples of _________ based on the biodiversity that benefit humans.

Correct AnswerverifiedShow Answer

The objective of a species recovery plan is to

Correct AnswerverifiedShow Answer

Where will you find the greatest concentration of different species?

Correct AnswerverifiedShow Answer

A species that is naturally rare or that has been depleted to dangerous levels is known, according to the Endangered Species Act, as a(n) ________ species.

Correct AnswerverifiedShow Answer

Zoo animals in the U.S. today come mainly from the wild.

Correct AnswerverifiedShow Answer

Ecological diversity

Correct AnswerverifiedShow Answer

Which of the following fish is safe and environmentally friendly to eat?

Correct AnswerverifiedShow Answer

What do Eurasian milfoil, kudzu vine and the emerald ash borer have in common?

Correct AnswerverifiedShow Answer

The pharmaceutical industry has an interest in preventing species extinction because

Correct AnswerverifiedShow Answer

Ecological diversity is a measure of the number of

Correct AnswerverifiedD

Invasive (exotic) species tend to __________ the balance of ecosystems and ______ biodiversity.

Correct AnswerverifiedShow Answer

Name at least three invasive species that live in your area. What are some of the problems they are causing? Is anything being done to control these species?

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Flagship species

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Invasive (exotic) species tend to ____ the balance of ecosystems and biodiversity.

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