Question 1

A worldwide loss of biodiversity is underway because of human activities.

Accepted Answer

A) True 
 B)False

Question 2

The "background" species extinction rate

Accepted Answer

A)  estimates how quickly species disappeared before human intervention.
B)  measures today's extinction rate of plants.
C)  measures today's extinction rate of animals.
D)  estimates how many extinctions humans are causing.
E)  All answers are correct.F) None of the above
G) A) and B)

Question 3

Carbon dioxide gas is not a major contributor to the greenhouse effect.

Accepted Answer

A) True 
 B)False

Question 4

One key to reversing environmental decline is to slow the growth of the human population.

Accepted Answer

A) True 
 B)False

Question 5

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) A) and E)
G) B) and E)

Question 6

Forests are expanding and deserts are shrinking worldwide.

Accepted Answer

A) True 
 B)False

Question 7

The ozone layer is part of the

Accepted Answer

A)  ionosphere.
B)  stratosphere.
C)  troposphere.
D)  biosphere.
E)  limnetic zonE.F) A) and B)
G) A) and C)

Question 8

Since the settling of North America by Europeans,only about ___________ of the original temperate forest area survives.

Accepted Answer

A)  1%
B)  5%
C)  10%
D)  20%
E)  25%F) D) and E)
G) B) and C)

Question 9

What is the benefit of biodiversity to humans?

Accepted Answer

A)  Production of oxygen for aerobic respiration to make ATP
B)  Energy
C)  Source of drugs
D)  Variety of food sources
E)  All answers are correct.F) C) and E)
G) A) and B)

Question 10

Which of the following is not an effect of acid deposition?

Accepted Answer

A)  destruction of aquatic food webs
B)  thinning of high-elevation forests
C)  decrease in the number of species that can survive in the lake ecosystem
D)  increase of pH in lakes
E)  deformities in fish and other aquatic organismsF) A) and D)
G) D) and E)

Question 11

In addition to eutrophication in lakes,which process is caused by excess nutrients in rivers?

Accepted Answer

A)  warming of the water in the Gulf of Mexico
B)  introduction of exotic species like Zebra mussels
C)  the dead zone in the Gulf of Mexico
D)  decreased plant growth
E)  clogging of city water linesF) All of the above
G) C) and E)

Question 12

Global warming is a human-caused increase in the greenhouse gases in Earth's atmosphere,thereby causing climate conditions more extreme than the greenhouse effect alone.

Accepted Answer

A) True 
 B)False

Question 13

In the section "Investigating Life: The Case of the Missing Frogs: Is Climate the Culprit?",what happened to temperatures in the cloud forest over the past 40 years based on Part B of the figure?

Accepted Answer

A)  Maximum temperatures increased and minimum temperatures dropped.
B)  Temperatures overall increased.
C)  Temperatures overall decreased.
D)  Temperatures were constant.
E)  Maximum temperatures dropped and minimum temperatures increased.F) A) and C)
G) A) and D)

Question 14

Habitat destruction and the greenhouse effect are the two most important threats to biodiversity.

Accepted Answer

A) True 
 B)False

Question 15

Of every 100 species introduced,only one persists to take over a niche.

Accepted Answer

A) True 
 B)False

Question 16

The ozone layer absorbs much of the harmful UV wavelengths of light that would otherwise reach Earth.

Accepted Answer

A) True 
 B)False

Question 17

How does damming a river destroy wetlands?

Accepted Answer

A)  Fish can no longer migrate up and down the river.
B)  Wetlands can no longer obtain nutrients from annual floods.
C)  Wetlands can no longer obtain oxygen from the flowing water of the river.
D)  Birds can no longer get to the wetlands.
E)  Increased nutrients flow into the wetlands causing eutrophication.F) A) and C)
G) B) and C)

Question 18

The ozone layer absorbs harmful ______ wavelengths of light.

Accepted Answer

A)  ultraviolet
B)  violet
C)  red
D)  blue
E)  greenF) A) and B)
G) A) and E)

Question 19

Since the Endangered Species Act of 1973 was passed,about ______ species of animals and ______ species of plants and lichens have been placed on the list of threatened or endangered species.

Accepted Answer

A)  575,750
B)  200,100
C)  1050,2375
D)  375,350
E)  20,50F) B) and E)
G) A) and B)

Question 20

How is biodiversity measured in a given area?

Accepted Answer

A)  genetic diversity within the population of trees
B)  the diversity of species of trees
C)  the diversity of ecosystems in the area
D)  the diversity of species of bacteria
E)  All answers are correct.F) A) and E)
G) A) and D)

Exam 20: Preserving Biodiversity

Of every 100 species introduced,only one persists to take over a niche.

Correct AnswerverifiedShow Answer

The ozone layer is part of the

Correct AnswerverifiedShow Answer

Global warming is a human-caused increase in the greenhouse gases in Earth's atmosphere,thereby causing climate conditions more extreme than the greenhouse effect alone.

Correct AnswerverifiedShow Answer

Since the Endangered Species Act of 1973 was passed,about ______ species of animals and ______ species of plants and lichens have been placed on the list of threatened or endangered species.

Correct AnswerverifiedShow Answer

Carbon dioxide gas is not a major contributor to the greenhouse effect.

Correct AnswerverifiedShow Answer

A worldwide loss of biodiversity is underway because of human activities.

Correct AnswerverifiedShow Answer

The ozone layer absorbs much of the harmful UV wavelengths of light that would otherwise reach Earth.

Correct AnswerverifiedShow Answer

In addition to eutrophication in lakes,which process is caused by excess nutrients in rivers?

Correct AnswerverifiedShow Answer

In the section "Investigating Life: The Case of the Missing Frogs: Is Climate the Culprit?",what happened to temperatures in the cloud forest over the past 40 years based on Part B of the figure?

Correct AnswerverifiedShow Answer

The "background" species extinction rate

Correct AnswerverifiedShow Answer

Canvasback ducks and bog turtles are likely impacted by purple loosestrife by

Correct AnswerverifiedShow Answer

How is biodiversity measured in a given area?

Correct AnswerverifiedShow Answer

Forests are expanding and deserts are shrinking worldwide.

Correct AnswerverifiedShow Answer

The ozone layer absorbs harmful ______ wavelengths of light.

Correct AnswerverifiedShow Answer

One key to reversing environmental decline is to slow the growth of the human population.

Correct AnswerverifiedShow Answer

What is the benefit of biodiversity to humans?

Correct AnswerverifiedShow Answer

How does damming a river destroy wetlands?

Correct AnswerverifiedShow Answer

Which of the following is not an effect of acid deposition?

Correct AnswerverifiedShow Answer

Since the settling of North America by Europeans,only about ___________ of the original temperate forest area survives.

Correct AnswerverifiedShow Answer

Habitat destruction and the greenhouse effect are the two most important threats to biodiversity.

Correct AnswerverifiedShow Answer

Correct Answer
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Since the Endangered Species Act of 1973 was passed,about species of animals and species of plants and lichens have been placed on the list of threatened or endangered species.

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