Question 1

The current extinction rate of vertebrates is some ________ times the historical background.This is primarily due to habitat destruction.

Accepted Answer

A)   5 to 10
B)   25 to 50
C)   100 to 1000
D)   1000 to 10,000
E)   50 to 75F) C) and E)
G) A) and C)

Question 2

To be considered ________,an introduced species must begin breeding in its new location and spread widely from its point of introduction causing destruction.

Accepted Answer

A)   resourceful
B)   harmful
C)   native
D)   dominant
E)   invasiveF) A) and E)
G) A) and D)

Question 3

What resulted in the biodiversity on Earth?

Accepted Answer

A)   evolution
B)   global climate change
C)   the greenhouse effect
D)   overexploitation
E)   bycatchF) D) and E)
G) A) and C)

Question 4

Overexploitation is harvesting a species faster than it can reproduce.

Accepted Answer

A) True 
 B)False

Question 5

There are ________ parts per million of carbon dioxide in the Earth's atmosphere.

Accepted Answer

A)   10
B)   17
C)   400
D)   125
E)   21F) C) and D)
G) C) and E)

Question 6

Humans can survive on Earth without biodiversity.

Accepted Answer

A) True 
 B)False

Question 7

Since the 1950s,only 1% of the ocean's large predatory fish have disappeared.

Accepted Answer

A) True 
 B)False

Question 8

In many wetlands, nonnative purple loosestrife has become the dominant plant species, often accounting for 90% of the total plant mass. The populations of cattails, canvasback ducks, and bog turtles have decreased in areas with purple loosestrife.
-Canvasback ducks and bog turtles are likely impacted by purple loosestrife by

Accepted Answer

A)   loss of food.
B)   loss of diversity.
C)   overexploitation.
D)   pollution.
E)   climate change.F) C) and D)
G) A) and C)

Question 9

In the Investigating Life,"Up,Up,and Away," researchers showed that the population of alpine chipmunks

Accepted Answer

A)   moved toward the top of the mountain as the climate increased.
B)   had a decrease in genetic isolation.
C)   moved toward the top of the mountain and had an increase in genetic isolation.
D)   moved toward the top of the mountain and had a decrease in genetic isolation.
E)   remained at the bottom of the mountain.F) A) and B)
G) None of the above

Question 10

Why is it important to maintain biodiversity?

Accepted Answer

A)   to preserve ecosystems
B)   to protect species richness
C)   to provide resources to humans
D)   to maintain genetic variation 
E)   All answers are correct.F) B) and E)
G) All of the above

Exam 20: Preserving Biodiversity

Overexploitation is harvesting a species faster than it can reproduce.

Correct Answer
verified

There are ________ parts per million of carbon dioxide in the Earth's atmosphere.

Correct Answer
verified

Humans can survive on Earth without biodiversity.

Correct Answer
verified

To be considered ________,an introduced species must begin breeding in its new location and spread widely from its point of introduction causing destruction.

Correct Answer
verified

Why is it important to maintain biodiversity?

Correct Answer
verified

In the Investigating Life,"Up,Up,and Away," researchers showed that the population of alpine chipmunks

Correct Answer
verified

The current extinction rate of vertebrates is some ________ times the historical background.This is primarily due to habitat destruction.

Correct Answer
verified

Correct Answer
verified

Since the 1950s,only 1% of the ocean's large predatory fish have disappeared.

Correct Answer
verified

What resulted in the biodiversity on Earth?

Correct Answer
verified

Exam 20: Preserving Biodiversity

Overexploitation is harvesting a species faster than it can reproduce.

Correct AnswerverifiedShow Answer

There are ________ parts per million of carbon dioxide in the Earth's atmosphere.

Correct AnswerverifiedShow Answer

Humans can survive on Earth without biodiversity.

Correct AnswerverifiedShow Answer

To be considered ________,an introduced species must begin breeding in its new location and spread widely from its point of introduction causing destruction.

Correct AnswerverifiedShow Answer

Why is it important to maintain biodiversity?

Correct AnswerverifiedShow Answer

In the Investigating Life,"Up,Up,and Away," researchers showed that the population of alpine chipmunks

Correct AnswerverifiedShow Answer

The current extinction rate of vertebrates is some ________ times the historical background.This is primarily due to habitat destruction.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Since the 1950s,only 1% of the ocean's large predatory fish have disappeared.

Correct AnswerverifiedShow Answer

What resulted in the biodiversity on Earth?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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