Question 1

The approximate number of humans on Earth is 7 billion.

Accepted Answer

A) True 
 B)False  True

Question 2

The carrying capacity of a habitat always remains the same.

Accepted Answer

A) True 
 B)False  False

Question 3

In natural systems, populations do not change in size when birth + immigration = death + emigration.

Accepted Answer

A) True 
 B)False  True

Question 4

A _______-shaped curve describes population growth that occurs when a population grows exponentially.

Accepted Answer

The answer of A _______-shaped curve describes population growth that...

Question 5

The human population is very good at

Accepted Answer

A)  growing. 
B)  consuming energy. 
C)  controlling its growth. 
D)  a and b above 
A)  growing. 
B)  consuming energy. 
C)  controlling its growth. 
D)  a and b above

Question 6

Exponential growth curves are always J-shaped.

Accepted Answer

A) True 
 B)False

Question 7

Populations generally change in size over time.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following populations would be most vulnerable to an outbreak of disease?

Accepted Answer

A)  10 grasshoppers living in an area of 100 square meters. 
B)  100 rabbits living in an area of 10,000 square meters 
C)  200 sparrows living in an area of 20,000 square meters 
D)  250,000 people living in an area of 100,000 square meters 
A)  10 grasshoppers living in an area of 100 square meters. 
B)  100 rabbits living in an area of 10,000 square meters 
C)  200 sparrows living in an area of 20,000 square meters 
D)  250,000 people living in an area of 100,000 square meters

Question 9

Food shortages and communicable disease are examples of factors that would _______ a population's growth rate.

Accepted Answer

The answer of Food shortages and communicable disease are examples...

Question 10

Lynx feed on rabbits, and the growth curves for these two species fluctuate together. This relationship is an example of a(n)

Accepted Answer

A)  S-shaped growth curve. 
B)  J-shaped growth curve. 
C)  irregular fluctuation. 
D)  tightly linked cycle. 
A)  S-shaped growth curve. 
B)  J-shaped growth curve. 
C)  irregular fluctuation. 
D)  tightly linked cycle.

Question 11

The human population crash that occurred on Easter Island was due to

Accepted Answer

A)  fire. 
B)  expanding forests and the consequent loss of farmland. 
C)  the aftermath of a volcanic eruption. 
D)  deforestation, soil erosion, and resource depletion. 
A)  fire. 
B)  expanding forests and the consequent loss of farmland. 
C)  the aftermath of a volcanic eruption. 
D)  deforestation, soil erosion, and resource depletion.

Question 12

A new species is introduced into a given area. The population size begins to grow slowly, then at a very rapid rate, and finally levels off at a stable number. This growth pattern is best represented by a(n)

Accepted Answer

A)  oscillating cycle. 
B)  J-shaped population curve. 
C)  A-shaped population curve. 
D)  S-shaped population curve. 
A)  oscillating cycle. 
B)  J-shaped population curve. 
C)  A-shaped population curve. 
D)  S-shaped population curve.

Question 13

The decrease in the availability of food or cover that accompanies increasing population size illustrates the concept of a

Accepted Answer

A)  density-dependent factor. 
B)  density-independent factor. 
C)  emigration-related factor. 
D)  high carrying capacity factor. 
A)  density-dependent factor. 
B)  density-independent factor. 
C)  emigration-related factor. 
D)  high carrying capacity factor.

Question 14

The population explosion that occurred shortly after the Opuntia cactus was introduced to Australia is an example of

Accepted Answer

A)  exponential growth. 
B)  emigration. 
C)  reduced population density. 
D)  a native species outcompeting an introduced species. 
A)  exponential growth. 
B)  emigration. 
C)  reduced population density. 
D)  a native species outcompeting an introduced species.

Question 15

A population of 100 individuals is undergoing exponential growth, with a constant growth rate of 0.2 per year. What size will this population be in two years?

Accepted Answer

A)  100 
B)  120 
C)  144 
D)  200 
A)  100 
B)  120 
C)  144 
D)  200

Question 16

Population size _______ when the combination of death and emigration rates are lower than the combination of birth and immigration rates.

Accepted Answer

The answer of Population size _______ when the combination of...

Question 17

Humans are the only species not subject to limits on the size of its population.

Accepted Answer

A) True 
 B)False

Question 18

The maximum population size that can be supported by its habitat is known as

Accepted Answer

A)  maximum increase. 
B)  carrying capacity. 
C)  exponential growth. 
D)  population balance. 
A)  maximum increase. 
B)  carrying capacity. 
C)  exponential growth. 
D)  population balance.

Question 19

A population can increase in size indefinitely.

Accepted Answer

A) True 
 B)False

Question 20

The rate of human population growth has not yet leveled off because

Accepted Answer

A)  the human population experiences a greater number of births than deaths each year. 
B)  humans are using resources more rapidly than they are replenished, a pattern of resource use that allows the population to temporarily increase but that cannot be sustained. 
C)  humans use technology to increase the carrying capacity of the places where they live. 
D)  all of the above 
A)  the human population experiences a greater number of births than deaths each year. 
B)  humans are using resources more rapidly than they are replenished, a pattern of resource use that allows the population to temporarily increase but that cannot be sustained. 
C)  humans use technology to increase the carrying capacity of the places where they live. 
D)  all of the above

Exam 34: Growth of Populations

The approximate number of humans on Earth is 7 billion.

The carrying capacity of a habitat always remains the same.

In natural systems, populations do not change in size when birth + immigration = death + emigration.

A _______-shaped curve describes population growth that occurs when a population grows exponentially.

The human population is very good at

Exponential growth curves are always J-shaped.

Populations generally change in size over time.

Which of the following populations would be most vulnerable to an outbreak of disease?

Food shortages and communicable disease are examples of factors that would _______ a population's growth rate.

Lynx feed on rabbits, and the growth curves for these two species fluctuate together. This relationship is an example of a(n)

The human population crash that occurred on Easter Island was due to

A new species is introduced into a given area. The population size begins to grow slowly, then at a very rapid rate, and finally levels off at a stable number. This growth pattern is best represented by a(n)

The decrease in the availability of food or cover that accompanies increasing population size illustrates the concept of a

The population explosion that occurred shortly after the Opuntia cactus was introduced to Australia is an example of

A population of 100 individuals is undergoing exponential growth, with a constant growth rate of 0.2 per year. What size will this population be in two years?

Population size _______ when the combination of death and emigration rates are lower than the combination of birth and immigration rates.

Humans are the only species not subject to limits on the size of its population.

The maximum population size that can be supported by its habitat is known as

A population can increase in size indefinitely.

The rate of human population growth has not yet leveled off because

The Nature of Science and the Characteristics of Life

Organizing the Diversity of Life

Major Groups of Living Organisms

Chemical Building Blocks

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy and Enzymes

Photosynthesis and Cellular Respiration

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

DNA

From Gene to Protein

Control of Gene Expression

DNA Technology

How Evolution Works

Evolution of Populations

Adaptation and Speciation

The Evolutionary History of Life

Maintaining the Internal Environment

Animal Nutrition and Digestion

Gas Exchange

The Circulatory System

Animal Hormones

The Nervous System

Sensing the Environment

Skeletons, Muscles, and Movement

Defenses against Disease

Reproduction and Development

Animal Behavior

Plant Structure, Nutrition, and Transport

Plant Growth and Reproduction

The Biosphere

Interactions among Organisms

Communities of Organisms

Ecosystems

Global Change

Biodiversity and People

Cancer: Cell Division Out of Control

Harnessing the Human Genome

Humans and Evolution

Smoking--Beyond Lung Cancer

Feeding a Hungry Planet

Building a Sustainable Society

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