Question 1

What might cause a uniform population distribution?

Accepted Answer

A)  Competition for resources 
B)  Scarce resources 
C)  The need to hunt in a group 
D)  The need for a group to care for its offspring 
E)  The need to find a mate 
A)  Competition for resources 
B)  Scarce resources 
C)  The need to hunt in a group 
D)  The need for a group to care for its offspring 
E)  The need to find a mate

Question 2

The collective human ecological footprint is now much larger than Earthʹs sustainable resource base.

Accepted Answer

A) True 
 B)False

Question 3

To determine the number of individuals added to a population during a given time, multiply the growth rate (r) by the

Accepted Answer

A)  number of immigrants. 
B)  biotic potential. 
C)  final population size. 
D)  environmental resistance. 
E)  original population size. 
A)  number of immigrants. 
B)  biotic potential. 
C)  final population size. 
D)  environmental resistance. 
E)  original population size.

Question 4

In countries where the number of children younger than 15 is approximately equal to the number between ages 15 and 45, the population is

Accepted Answer

A)  shrinking slightly. 
B)  growing exponentially. 
C)  stable. 
D)  expanding slowly. 
E)  declining drastically. 
A)  shrinking slightly. 
B)  growing exponentially. 
C)  stable. 
D)  expanding slowly. 
E)  declining drastically.

Question 5

Prey, such as lemmings, may have a density-dependent effect on predator populations, such as those of the snowy owl, by enabling the predator to increase the number of its offspring at high prey densities.

Accepted Answer

A) True 
 B)False

Question 6

When a population has inhabited an area for a long time and the population size has stabilized, then

Accepted Answer

A)  density-independent factors are involved. 
B)  density dependence is clearly not involved in the population growth. 
C)  the carrying capacity of the area has been reached. 
D)  the environmental resistance declines. 
E)  predation decreases. 
A)  density-independent factors are involved. 
B)  density dependence is clearly not involved in the population growth. 
C)  the carrying capacity of the area has been reached. 
D)  the environmental resistance declines. 
E)  predation decreases.

Question 7

What factors determine the natural increase of a population?

Accepted Answer

The growth rate is b

Question 8

Which of the following is an important density-independent factor limiting population size?

Accepted Answer

A)  Weather 
B)  Predation 
C)  Environmental resistance 
D)  Quantity of food 
E)  Competition 
A)  Weather 
B)  Predation 
C)  Environmental resistance 
D)  Quantity of food 
E)  Competition

Question 9

Why does a bacteria population have a higher biotic potential than a population of humans?

Accepted Answer

A bacteria population can increase more

Question 10

Developing countries tend to have a(n) _________age structure diagram.

Accepted Answer

A)  square 
B)  inverted-triangle-shaped 
C)  triangular-shaped 
D)  round 
E)  rectangular 
A)  square 
B)  inverted-triangle-shaped 
C)  triangular-shaped 
D)  round 
E)  rectangular

Question 11

Density-dependent factors become more effective at limiting population growth as the size of the population_________ .

Accepted Answer

The answer of Density-dependent factors become more effective at limiting...

Question 12

A population that initially grows rapidly, then slows, and eventually stabilizes close to the carrying capacity of the environment exhibits _________population growth.

Accepted Answer

logistic (

Question 13

A population grows exponentially when

Accepted Answer

A)  emigration exceeds immigration and the birth rate equals the death rate. 
B)  the birth rate and the death rate are equal. 
C)  the birth rate exceeds the death rate and immigration exceeds emigration. 
D)  the carrying capacity is exceeded. 
E)  the death rate equals the birth rate and immigration is equal to emigration. 
A)  emigration exceeds immigration and the birth rate equals the death rate. 
B)  the birth rate and the death rate are equal. 
C)  the birth rate exceeds the death rate and immigration exceeds emigration. 
D)  the carrying capacity is exceeded. 
E)  the death rate equals the birth rate and immigration is equal to emigration.

Question 14

The human population currently shows a J-curve growth pattern.

Accepted Answer

A) True 
 B)False

Question 15

In the equation, population growth = r × N, the letter r stands for_________ .

Accepted Answer

The answer of In the equation, population growth = r...

Question 16

What term describes the maximum population size that the environment can support indefinitely?

Accepted Answer

The answer of What term describes the maximum population size...

Question 17

A laboratory experiment followed the growth of a flour beetle (Tribolium sp.) population over time. At first, the population increased dramatically, but later the growth slowed and the population size leveled off. Although food (the wheat flour in which they live) was still abundant, the flour beetles resorted to eating their own eggs when population densities got high. What can we conclude about cannibalism in this species?

Accepted Answer

A)  It is a density-independent means of population control. 
B)  We cannot reach any conclusions based on the information provided. 
C)  It is clearly maladaptive, as populations always do best when their densities increase as much as possible. 
D)  It has no effect on the growth of the population, as food scarcity is clearly the limiting factor. 
E)  It is a density-dependent means of population control. 
A)  It is a density-independent means of population control. 
B)  We cannot reach any conclusions based on the information provided. 
C)  It is clearly maladaptive, as populations always do best when their densities increase as much as possible. 
D)  It has no effect on the growth of the population, as food scarcity is clearly the limiting factor. 
E)  It is a density-dependent means of population control.

Question 18

Exponential growth occurs when

Accepted Answer

A)  the rate of emigration is higher than the rate of immigration. 
B)  the biotic potential decreases each year. 
C)  the number of births each year is constant and the birth rate is higher than the death rate. 
D)  the population grows by a fixed percentage of its size each year. 
E)  environmental resistance declines each year. 
A)  the rate of emigration is higher than the rate of immigration. 
B)  the biotic potential decreases each year. 
C)  the number of births each year is constant and the birth rate is higher than the death rate. 
D)  the population grows by a fixed percentage of its size each year. 
E)  environmental resistance declines each year.

Question 19

When predators and prey both have population cycles, the predator cycle tends to_________that of the prey cycle.

Accepted Answer

The answer of When predators and prey both have population...

Question 20

Competition among individual members of the same species is referred to as_________competition.

Accepted Answer

The answer of Competition among individual members of the same...

Exam 27: Population Growth and Regulation

What might cause a uniform population distribution?

The collective human ecological footprint is now much larger than Earthʹs sustainable resource base.

To determine the number of individuals added to a population during a given time, multiply the growth rate (r) by the

In countries where the number of children younger than 15 is approximately equal to the number between ages 15 and 45, the population is

Prey, such as lemmings, may have a density-dependent effect on predator populations, such as those of the snowy owl, by enabling the predator to increase the number of its offspring at high prey densities.

When a population has inhabited an area for a long time and the population size has stabilized, then

What factors determine the natural increase of a population?

Which of the following is an important density-independent factor limiting population size?

Why does a bacteria population have a higher biotic potential than a population of humans?

Developing countries tend to have a(n) _________age structure diagram.

Density-dependent factors become more effective at limiting population growth as the size of the population_________ .

A population that initially grows rapidly, then slows, and eventually stabilizes close to the carrying capacity of the environment exhibits _________population growth.

A population grows exponentially when

The human population currently shows a J-curve growth pattern.

In the equation, population growth = r × N, the letter r stands for_________ .

What term describes the maximum population size that the environment can support indefinitely?

Exponential growth occurs when

When predators and prey both have population cycles, the predator cycle tends to_________that of the prey cycle.

Competition among individual members of the same species is referred to as_________competition.

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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