Question 1

Humans have had a lasting impact on the physical appearance of Earth.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following statements best describes the relationship between deforestation and changes in atmospheric carbon dioxide levels?

Accepted Answer

A)  In the absence of forests,herbivore populations decline;without their respiration,less carbon dioxide is recycled into the atmosphere. 
B)  The carbon dioxide used by forest plants for cellular respiration would all be released into the atmosphere at once. 
C)  Trees naturally die and decompose,but when they are turned into lumber their carbon is prevented from recycling back to the atmosphere. 
D)  In the absence of forest plants,less carbon dioxide is removed from the atmosphere for use during photosynthesis. 
A)  In the absence of forests,herbivore populations decline;without their respiration,less carbon dioxide is recycled into the atmosphere. 
B)  The carbon dioxide used by forest plants for cellular respiration would all be released into the atmosphere at once. 
C)  Trees naturally die and decompose,but when they are turned into lumber their carbon is prevented from recycling back to the atmosphere. 
D)  In the absence of forest plants,less carbon dioxide is removed from the atmosphere for use during photosynthesis.

Question 3

The best hope for slowing Earth's rapid ecological changes is to decrease the ________ impact on the biosphere to a sustainable level.

Accepted Answer

The answer of The best hope for slowing Earth's rapid...

Question 4

Which of the following phenomena is NOT evidence of global warming?

Accepted Answer

A)  During the last decade from 2001-2010,the highest temperatures in history have been recorded. 
B)  In Europe,bird and butterfly species have shifted their ranges northward. 
C)  The frequency of severe weather and the length of storm seasons have decreased. 
D)  Plants in northern latitudes have increased the length of their growing seasons. 
A)  During the last decade from 2001-2010,the highest temperatures in history have been recorded. 
B)  In Europe,bird and butterfly species have shifted their ranges northward. 
C)  The frequency of severe weather and the length of storm seasons have decreased. 
D)  Plants in northern latitudes have increased the length of their growing seasons.

Question 5

As a result of climate change,areas that are far from water may become drier because global warming causes evaporation rates to ________.

Accepted Answer

The answer of As a result of climate change,areas that...

Question 6

What characteristics would we expect to find in species that will most likely prosper as projected climate change occurs?

Accepted Answer

A)  organisms with narrow tolerances that can live in specialized environments 
B)  organisms with broad tolerances that can live in a variety of habitats 
C)  organisms that live in very stable environments 
D)  organisms that can live only if they form mutualistic relationships with other organisms 
A)  organisms with narrow tolerances that can live in specialized environments 
B)  organisms with broad tolerances that can live in a variety of habitats 
C)  organisms that live in very stable environments 
D)  organisms that can live only if they form mutualistic relationships with other organisms

Question 7

Only natural nutrients cycle through ecosystems;synthetic chemicals do not cycle through ecosystems.

Accepted Answer

A) True 
 B)False

Question 8

Loss of biodiversity is an example of

Accepted Answer

A)  global change. 
B)  global warming. 
C)  climate change. 
D)  net primary productivity. 
A)  global change. 
B)  global warming. 
C)  climate change. 
D)  net primary productivity.

Question 9

Atmospheric scientists anticipate a 1.1-6.4°C temperature increase by the end of the twenty-first century.What impacts would this change bring?

Accepted Answer

A)  Some plant and animal species will migrate to cooler locations,whereas others will become extinct. 
B)  Increases in ocean evaporation and terrestrial rainfall will have a positive impact on the world's agricultural systems. 
C)  The frequency of severe weather will decrease. 
D)  The polar ice caps will increase in size. 
A)  Some plant and animal species will migrate to cooler locations,whereas others will become extinct. 
B)  Increases in ocean evaporation and terrestrial rainfall will have a positive impact on the world's agricultural systems. 
C)  The frequency of severe weather will decrease. 
D)  The polar ice caps will increase in size.

Question 10

Suppose that a scientist discovers a method for removing 100 percent of the greenhouse gases from the Earth's atmosphere.Considering the information shown in the figure,would it be wise to use this technology?

Accepted Answer

A)  Yes,because it would halt global warming. 
B)  Yes,because it would increase ocean acidification. 
C)  No,because too much infrared radiation would be absorbed by Earth's surface. 
D)  No,because too much heat would be lost back into space. 
A)  Yes,because it would halt global warming. 
B)  Yes,because it would increase ocean acidification. 
C)  No,because too much infrared radiation would be absorbed by Earth's surface. 
D)  No,because too much heat would be lost back into space.

Question 11

Persistent organic pollutants (POPs)that interfere with hormone function are known as

Accepted Answer

A)  greenhouse gases. 
B)  ozone depleters. 
C)  endocrine disrupters. 
D)  trophic contaminants. 
A)  greenhouse gases. 
B)  ozone depleters. 
C)  endocrine disrupters. 
D)  trophic contaminants.

Question 12

Which of the following statements about carbon dioxide levels in Earth's atmosphere is true?

Accepted Answer

A)  They peaked around 1950 and have been slowly decreasing since then. 
B)  They are high now but are not higher than the highest estimated levels during the last 420,000 years. 
C)  They are estimated to be higher now than at any time in the past 420,000 years. 
D)  They began to decrease when the use of CFCs stopped. 
A)  They peaked around 1950 and have been slowly decreasing since then. 
B)  They are high now but are not higher than the highest estimated levels during the last 420,000 years. 
C)  They are estimated to be higher now than at any time in the past 420,000 years. 
D)  They began to decrease when the use of CFCs stopped.

Question 13

The example of cheetahs blinded by thorny plants indicates that the effects of chemical cycle disruption

Accepted Answer

A)  produce a chain reaction of results that cannot always be predicted. 
B)  can all be predicted by ecologists who are experts in their field. 
C)  are very limited and probably won't affect humans. 
D)  will not be observed for decades. 
A)  produce a chain reaction of results that cannot always be predicted. 
B)  can all be predicted by ecologists who are experts in their field. 
C)  are very limited and probably won't affect humans. 
D)  will not be observed for decades.

Question 14

Phytoplankton are ecologically important because they

Accepted Answer

A)  are bioindicators of the amount of ice in the polar bear's ecosystem. 
B)  contribute to atmospheric oxygen through photosynthesis. 
C)  absorb acid to prevent ocean acidification. 
D)  are an important source of vitamins for polar bears. 
A)  are bioindicators of the amount of ice in the polar bear's ecosystem. 
B)  contribute to atmospheric oxygen through photosynthesis. 
C)  absorb acid to prevent ocean acidification. 
D)  are an important source of vitamins for polar bears.

Question 15

Humans are changing the way many chemicals ________ through ecosystems.

Accepted Answer

The answer of Humans are changing the way many chemicals...

Question 16

The addition of carbon dioxide to Earth's atmosphere also increases the amount of carbon dioxide dissolved in ocean water.This process has the effect of

Accepted Answer

A)  cooling the ocean water by increasing the rate of evaporation. 
B)  warming the ocean water by decreasing the rate of evaporation. 
C)  increasing the acidity of ocean water because dissolved carbon dioxide makes the water more acidic. 
D)  decreasing the acidity of ocean water because dissolved carbon dioxide makes the water less acidic. 
A)  cooling the ocean water by increasing the rate of evaporation. 
B)  warming the ocean water by decreasing the rate of evaporation. 
C)  increasing the acidity of ocean water because dissolved carbon dioxide makes the water more acidic. 
D)  decreasing the acidity of ocean water because dissolved carbon dioxide makes the water less acidic.

Question 17

Which of the following statements about POPs that have an atmospheric cycle is true?

Accepted Answer

A)  They can have only localized effects. 
B)  They can be spread over large distances. 
C)  They cannot be bioaccumulated. 
D)  They cannot cause water transformations. 
A)  They can have only localized effects. 
B)  They can be spread over large distances. 
C)  They cannot be bioaccumulated. 
D)  They cannot cause water transformations.

Question 18

As a result of climate change,rates of infectious disease caused by dengue fever virus and West Nile virus may increase because of the habitat shifts of ________.

Accepted Answer

The answer of As a result of climate change,rates of...

Question 19

If all bacteria were suddenly unable to absorb mercury,biomagnification of methylmercury would most likely

Accepted Answer

A)  stop. 
B)  continue. 
C)  continue,but only in the lower trophic levels. 
D)  continue,but only in the higher trophic levels. 
A)  stop. 
B)  continue. 
C)  continue,but only in the lower trophic levels. 
D)  continue,but only in the higher trophic levels.

Question 20

Humans are particularly adept at water transformation;scientists now estimate that human activities have affected nearly ________ percent of the world's rivers.

Accepted Answer

A)  10 
B)  40 
C)  70 
D)  100 
A)  10 
B)  40 
C)  70 
D)  100

Exam 25: Global Change

Humans have had a lasting impact on the physical appearance of Earth.

Which of the following statements best describes the relationship between deforestation and changes in atmospheric carbon dioxide levels?

The best hope for slowing Earth's rapid ecological changes is to decrease the ________ impact on the biosphere to a sustainable level.

Which of the following phenomena is NOT evidence of global warming?

As a result of climate change,areas that are far from water may become drier because global warming causes evaporation rates to ________.

What characteristics would we expect to find in species that will most likely prosper as projected climate change occurs?

Only natural nutrients cycle through ecosystems;synthetic chemicals do not cycle through ecosystems.

Loss of biodiversity is an example of

Atmospheric scientists anticipate a 1.1-6.4°C temperature increase by the end of the twenty-first century.What impacts would this change bring?

Suppose that a scientist discovers a method for removing 100 percent of the greenhouse gases from the Earth's atmosphere.Considering the information shown in the figure,would it be wise to use this technology?

Persistent organic pollutants (POPs)that interfere with hormone function are known as

Which of the following statements about carbon dioxide levels in Earth's atmosphere is true?

The example of cheetahs blinded by thorny plants indicates that the effects of chemical cycle disruption

Phytoplankton are ecologically important because they

Humans are changing the way many chemicals ________ through ecosystems.

The addition of carbon dioxide to Earth's atmosphere also increases the amount of carbon dioxide dissolved in ocean water.This process has the effect of

Which of the following statements about POPs that have an atmospheric cycle is true?

As a result of climate change,rates of infectious disease caused by dengue fever virus and West Nile virus may increase because of the habitat shifts of ________.

If all bacteria were suddenly unable to absorb mercury,biomagnification of methylmercury would most likely

Humans are particularly adept at water transformation;scientists now estimate that human activities have affected nearly ________ percent of the world's rivers.

The Nature of Science and the Characteristics of Life

The Chemistry of Life

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy, Metabolism, and Enzymes

Photosynthesis and Cellular Respiration

Cell Division

Cancer and Human Health

Patterns of Inheritance

Chromosomes and Human Genetics

DNA and Genes

From Gene to Protein

DNA Technology

How Evolution Works

The Origin of Species

The Evolution of Biodiversity

Biological Diversity, Bacteria, and Archaea

Protista, Plantae, and Fungi

Animalia

The Biosphere

Growth of Populations

Animal Behavior

Ecological Communities

Ecosystems

Internal Organization and Homeostasis

Nutrition and Digestion

Circulation and Gas Exchange

Animal Hormones

Nervous and Sensory Systems

Skeletons,Muscles,and Movement

The Immune System

Reproduction and Development

Plant Structure, Nutrition, and Transport

Plant Growth and Reproduction

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