Question 1

The United Nations estimates that by 2050, the world?s population may reach over _________billion and still be growing.

Accepted Answer

A)  15 
B)  12 
C)  7 
D)  20 
E)  9 
A)  15 
B)  12 
C)  7 
D)  20 
E)  9

Question 2

Explain what happens in exponential population growth.

Accepted Answer

The population grows by a fixe

Question 3

The maximum rate at which a population could increase is known as its_________ .

Accepted Answer

The answer of The maximum rate at which a population...

Question 4

Although social changes and increased access to contraceptives have caused a decrease in fertility rates in some less-developed countries, their rates are still above RLF.

Accepted Answer

A) True 
 B)False

Question 5

If all the people in the world were to live at the American level in terms of technology, wealth, education, and other factors, the population of the world would have to _________to support them.

Accepted Answer

A)  reduce by half 
B)  reduce to less than a tenth of the current level 
C)  decrease by 90% 
D)  reduce to a fifth of the current level 
E)  double 
A)  reduce by half 
B)  reduce to less than a tenth of the current level 
C)  decrease by 90% 
D)  reduce to a fifth of the current level 
E)  double

Question 6

An effective parasite is one that kills its host quickly.

Accepted Answer

A) True 
 B)False

Question 7

A population of rabbits introduced into an island grew rapidly for a few years and then the growth slowed down and stabilized. Why did the population become stable?

Accepted Answer

A)  Environmental resistance declined. 
B)  The rate of immigration declined. 
C)  A bust cycle was about to begin. 
D)  The value of r decreased. 
E)  The carrying capacity was reached. 
A)  Environmental resistance declined. 
B)  The rate of immigration declined. 
C)  A bust cycle was about to begin. 
D)  The value of r decreased. 
E)  The carrying capacity was reached.

Question 8

To support the world population at the same standard of living as we have in the United States would require_________ times the resources that are available on Earth today.

Accepted Answer

A)  10 
B)  5 
C)  1.5 
D)  2 
E)  20 
A)  10 
B)  5 
C)  1.5 
D)  2 
E)  20

Question 9

A population of birds migrating to winter nesting grounds is blown off course by a late -season hurricane and ends up on an island that is uninhabited by any animal species. Which of the following represents a density-independent factor that will limit the population size?

Accepted Answer

A)  Abundant fruit trees 
B)  Abundant berry bushes 
C)  Nightly temperature dropping below freezing 
D)  Heavily wooded 
E)  Freshwater spring 
A)  Abundant fruit trees 
B)  Abundant berry bushes 
C)  Nightly temperature dropping below freezing 
D)  Heavily wooded 
E)  Freshwater spring

Question 10

Environmental resistance may limit the size of populations by

Accepted Answer

A)  decreasing both birth and death rates. 
B)  decreasing death rates and/or increasing birth rates. 
C)  increasing both birth and death rates. 
D)  changing the biotic potential. 
E)  increasing death rates and/or decreasing birth rates. 
A)  decreasing both birth and death rates. 
B)  decreasing death rates and/or increasing birth rates. 
C)  increasing both birth and death rates. 
D)  changing the biotic potential. 
E)  increasing death rates and/or decreasing birth rates.

Question 11

Purple loosestrife, a European plant, was introduced into the American Great Lakes region where it has no natural predators. Each plant produces thousands of seeds annually, and it now clogs acres of wetlands, crowding out native plants. Purple loosestrife is considered a(n)

Accepted Answer

A)  density-independent species. 
B)  predator. 
C)  invasive species. 
D)  density-dependent species. 
E)  replacement-level fertility species. 
A)  density-independent species. 
B)  predator. 
C)  invasive species. 
D)  density-dependent species. 
E)  replacement-level fertility species.

Question 12

If a caterpillar eats all of the seedlings in your garden, killing all of them, the caterpillar is acting as a

Accepted Answer

A)  competitor. 
B)  density-independent factor. 
C)  parasite. 
D)  predator. 
E)  saprophyte. 
A)  competitor. 
B)  density-independent factor. 
C)  parasite. 
D)  predator. 
E)  saprophyte.

Question 13

Environmental resistance is

Accepted Answer

A)  a factor that decreases both death rates and birth rates. 
B)  a factor that increases both death rates and birth rates. 
C)  limits imposed on population growth by only the nonliving environment. 
D)  limits imposed on population growth by both the living and nonliving environments. 
E)  limits imposed on population growth by only the living environment (e.g., predators or competitors). 
A)  a factor that decreases both death rates and birth rates. 
B)  a factor that increases both death rates and birth rates. 
C)  limits imposed on population growth by only the nonliving environment. 
D)  limits imposed on population growth by both the living and nonliving environments. 
E)  limits imposed on population growth by only the living environment (e.g., predators or competitors).

Question 14

-According to the graph, how long does it take the population of deer that is experiencing moderate growth (r = 0.2) to reach 3,000 deer?

Accepted Answer

A)  35 years 
B)  15 years 
C)  20 years 
D)  All three populations grow at the same rate. 
E)  None of the three populations grows to 3,000. 
A)  35 years 
B)  15 years 
C)  20 years 
D)  All three populations grow at the same rate. 
E)  None of the three populations grows to 3,000.

Question 15

The study of how organisms interact with one another and with their nonliving environment is

Accepted Answer

A)  genetics. 
B)  ecology. 
C)  morphology. 
D)  anatomy. 
E)  ecosystems. 
A)  genetics. 
B)  ecology. 
C)  morphology. 
D)  anatomy. 
E)  ecosystems.

Question 16

Some predators feed primarily on the most abundant prey. This is an example of _________predation.

Accepted Answer

A)  cyclical 
B)  density-dependent 
C)  competitive 
D)  density-independent 
E)  exponential 
A)  cyclical 
B)  density-dependent 
C)  competitive 
D)  density-independent 
E)  exponential

Question 17

In a population of lemmings, a sudden freeze that caused many of the lemmings to die is an example of a

Accepted Answer

A)  living and density-dependent factor. 
B)  normal boom-and-bust cycle. 
C)  nonliving and density-independent factor. 
D)  living and density-independent factor. 
E)  nonliving and density-dependent factor. 
A)  living and density-dependent factor. 
B)  normal boom-and-bust cycle. 
C)  nonliving and density-independent factor. 
D)  living and density-independent factor. 
E)  nonliving and density-dependent factor.

Question 18

The population shown in the graph is demonstrating

Accepted Answer

A)  a typical boom-and-bust pattern. 
B)  clumped distribution. 
C)  exponential growth. 
D)  logistic population growth. 
E)  an S-curve growth pattern. 
A)  a typical boom-and-bust pattern. 
B)  clumped distribution. 
C)  exponential growth. 
D)  logistic population growth. 
E)  an S-curve growth pattern.

Question 19

Which factor does NOT influence the size a population reaches through natural increase?

Accepted Answer

A)  Age of females at reproduction 
B)  Number of births 
C)  Number of deaths 
D)  Frequency of reproduction 
E)  Distance traveled by migrants 
A)  Age of females at reproduction 
B)  Number of births 
C)  Number of deaths 
D)  Frequency of reproduction 
E)  Distance traveled by migrants

Question 20

A J-curve is typical of a stable population.

Accepted Answer

A) True 
 B)False

Exam 27: Population Growth and Regulation

The United Nations estimates that by 2050, the world?s population may reach over _________billion and still be growing.

Explain what happens in exponential population growth.

The maximum rate at which a population could increase is known as its_________ .

Although social changes and increased access to contraceptives have caused a decrease in fertility rates in some less-developed countries, their rates are still above RLF.

If all the people in the world were to live at the American level in terms of technology, wealth, education, and other factors, the population of the world would have to _________to support them.

An effective parasite is one that kills its host quickly.

A population of rabbits introduced into an island grew rapidly for a few years and then the growth slowed down and stabilized. Why did the population become stable?

To support the world population at the same standard of living as we have in the United States would require_________ times the resources that are available on Earth today.

A population of birds migrating to winter nesting grounds is blown off course by a late -season hurricane and ends up on an island that is uninhabited by any animal species. Which of the following represents a density-independent factor that will limit the population size?

Environmental resistance may limit the size of populations by

Purple loosestrife, a European plant, was introduced into the American Great Lakes region where it has no natural predators. Each plant produces thousands of seeds annually, and it now clogs acres of wetlands, crowding out native plants. Purple loosestrife is considered a(n)

If a caterpillar eats all of the seedlings in your garden, killing all of them, the caterpillar is acting as a

Environmental resistance is

-According to the graph, how long does it take the population of deer that is experiencing moderate growth (r = 0.2) to reach 3,000 deer?

The study of how organisms interact with one another and with their nonliving environment is

Some predators feed primarily on the most abundant prey. This is an example of _________predation.

In a population of lemmings, a sudden freeze that caused many of the lemmings to die is an example of a

The population shown in the graph is demonstrating

Which factor does NOT influence the size a population reaches through natural increase?

A J-curve is typical of a stable population.

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

Cellular Reproduction

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

DNA: The Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Community Interactions

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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