Question 1

Scientists have identified approximately ________ million species of organisms, but millions more are thought to exist.

Accepted Answer

The answer of Scientists have identified approximately ________ million species...

Question 2

Sources of energy that are renewable and derived from plants are called ________.

Accepted Answer

The answer of Sources of energy that are renewable and...

Question 3

Although humans have had a negative impact on biodiversity in the past, the present global extinction rate is 20 times lower now than at any other time in the past.

Accepted Answer

A) True 
 B)False

Question 4

Commercial logging by European countries in the Ivory Coast has reduced the pristine 70 million acres of forests that once existed to about

Accepted Answer

A)  fewer than 1 million acres 
B)  5-7 million acres 
C)  15-20 million acres 
D)  30 million acres 
E)  50 million acres 
A)  fewer than 1 million acres 
B)  5-7 million acres 
C)  15-20 million acres 
D)  30 million acres 
E)  50 million acres

Question 5

The death of animal life in a shallow body of water in conjunction with a rapid increase in plant life is known as ________.

Accepted Answer

The answer of The death of animal life in a...

Question 6

Destruction of the ozone due to pollutants is limited to layers located only above North America.

Accepted Answer

A) True 
 B)False

Question 7

Human activities have resulted in at least one-third of the landmass of Earth being altered in some way.

Accepted Answer

A) True 
 B)False

Question 8

Smog forms when pollutants in the air react with each other in the presence of sunlight and carbon dioxide.

Accepted Answer

A) True 
 B)False

Question 9

What percent of Earth's water is fresh water?

Accepted Answer

A)  <1 
B)  5 
C)  10 
D)  25 
E)  40 
A)  <1 
B)  5 
C)  10 
D)  25 
E)  40

Question 10

________ is a biomass fuel.

Accepted Answer

A)  Coal 
B)  Oil 
C)  Wood 
D)  Gas 
E)  Water 
A)  Coal 
B)  Oil 
C)  Wood 
D)  Gas 
E)  Water

Question 11

Hydrocarbons and nitrogen oxides combine with water vapor in the presence of sunlight to form a gray layer of ________.

Accepted Answer

The answer of Hydrocarbons and nitrogen oxides combine with water...

Question 12

Some pollutants such as mercury or DDT become concentrated in the tissues of organisms higher on the food chain through a process referred to as ________.

Accepted Answer

biological magnifica

Question 13

The presence of chemicals or particles in air that have adverse effects on living organisms is termed

Accepted Answer

A)  acid rain 
B)  eutrophication 
C)  pollution 
D)  global warming 
E)  denitrification 
A)  acid rain 
B)  eutrophication 
C)  pollution 
D)  global warming 
E)  denitrification

Question 14

Subsistence farming in tropical regions of the world results in habitat loss because of the practices of ________ and ________.

Accepted Answer

burning, clear-cutti

Question 15

Which one of the following statements is TRUE regarding the water on Earth?

Accepted Answer

A)  When humans divert water from one region to another, they always ensure that it does not have an effect on normal migration patterns of other species. 
B)  Most of the water on Earth is frozen in glaciers and ice caps. 
C)  Residents of the less industrialized countries typically use more water than residents in industrialized countries. 
D)  Some semiarid and desert regions of the world have reached carrying capacity for humans due to the shortage of water. 
E)  Water is considered a renewable resource because it is plentiful in all regions of Earth. 
A)  When humans divert water from one region to another, they always ensure that it does not have an effect on normal migration patterns of other species. 
B)  Most of the water on Earth is frozen in glaciers and ice caps. 
C)  Residents of the less industrialized countries typically use more water than residents in industrialized countries. 
D)  Some semiarid and desert regions of the world have reached carrying capacity for humans due to the shortage of water. 
E)  Water is considered a renewable resource because it is plentiful in all regions of Earth.

Question 16

Humans have become so dependent on fossil fuels that despite an increasing body of evidence that indicates burning these fuels is destroying aspects of the environment, little change in the sources of fuels has occurred. What types of alternative fuels can be used to reduce negative impacts on the environment?

Accepted Answer

There are many alternative fuel sources

Question 17

Increasing population density on marginal lands in rural areas has resulted in desertification, which reduces the ability of the land to sustain the population.

Accepted Answer

A) True 
 B)False

Question 18

Biodiversity refers to the variety of richness of species on Earth.

Accepted Answer

A) True 
 B)False

Question 19

According to public health officials, all of the following may be caused by water pollutants EXCEPT which one?

Accepted Answer

A)  birth defects 
B)  nervous disorders 
C)  miscarriages 
D)  skin rashes 
E)  accommodation to allergies 
A)  birth defects 
B)  nervous disorders 
C)  miscarriages 
D)  skin rashes 
E)  accommodation to allergies

Question 20

Deep underground reservoirs of water are called

Accepted Answer

A)  gorges 
B)  eutrophic zones 
C)  non-phototrophic zones 
D)  aquifers 
E)  seismic buffers 
A)  gorges 
B)  eutrophic zones 
C)  non-phototrophic zones 
D)  aquifers 
E)  seismic buffers

Exam 24: Human Impacts, Biodiversity, and Environmental Issues

Scientists have identified approximately ________ million species of organisms, but millions more are thought to exist.

Sources of energy that are renewable and derived from plants are called ________.

Although humans have had a negative impact on biodiversity in the past, the present global extinction rate is 20 times lower now than at any other time in the past.

Commercial logging by European countries in the Ivory Coast has reduced the pristine 70 million acres of forests that once existed to about

The death of animal life in a shallow body of water in conjunction with a rapid increase in plant life is known as ________.

Destruction of the ozone due to pollutants is limited to layers located only above North America.

Human activities have resulted in at least one-third of the landmass of Earth being altered in some way.

Smog forms when pollutants in the air react with each other in the presence of sunlight and carbon dioxide.

What percent of Earth's water is fresh water?

________ is a biomass fuel.

Hydrocarbons and nitrogen oxides combine with water vapor in the presence of sunlight to form a gray layer of ________.

Some pollutants such as mercury or DDT become concentrated in the tissues of organisms higher on the food chain through a process referred to as ________.

The presence of chemicals or particles in air that have adverse effects on living organisms is termed

Subsistence farming in tropical regions of the world results in habitat loss because of the practices of ________ and ________.

Which one of the following statements is TRUE regarding the water on Earth?

Increasing population density on marginal lands in rural areas has resulted in desertification, which reduces the ability of the land to sustain the population.

Biodiversity refers to the variety of richness of species on Earth.

According to public health officials, all of the following may be caused by water pollutants EXCEPT which one?

Deep underground reservoirs of water are called

Human Biology, Science, and Society

The Chemistry of Living Things

Structure and Function of Cells

From Cells to Organ Systems

The Skeletal System

The Muscular System

Blood

Heart and Blood Vessels

The Immune System and Mechanisms of Defense

The Respiratory System: Exchange of Gases

The Nervous System: Integration and Control

Sensory Mechanisms

The Endocrine System

The Digestive System and Nutrition

The Urinary System

Reproductive Systems

Cell Reproduction and Differentiation

Cancer: Uncontrolled Cell Division and Differentiation

Genetics and Inheritance

DNA Technology and Genetic Engineering

Development and Aging

Evolution and the Origins of Life

Ecosystems and Populations

Filters

Subsistence farming in tropical regions of the world results in habitat loss because of the practices of and .