Question 1

The carrying capacity of a population can be affected by weather,the daily fluctuations in temperature,rainfall,and the other factors that contribute to climate.

Accepted Answer

A) True 
 B)False  False

Question 2

When population size is high,the rate of deaths related to disease,starvation,predator,and accidents increases; because their rates vary with population size,these mortality factors are considered ________.

Accepted Answer

density dependent

Question 3

For most populations,irregular fluctuations in size or density

Accepted Answer

A)  are less commonly experienced than the smooth J-shaped growth curve. 
B)  occur commonly before carrying capacity is reached. 
C)  are more common than the smooth J-shaped growth curve. 
D)  occur only when density-independent factors dominate. 
A)  are less commonly experienced than the smooth J-shaped growth curve. 
B)  occur commonly before carrying capacity is reached. 
C)  are more common than the smooth J-shaped growth curve. 
D)  occur only when density-independent factors dominate. B

Question 4

A population is counted at 100 individuals in 1998.In 2006,a new count found 1,600 individuals.What is the doubling time for the population?

Accepted Answer

A)  0.5 years 
B)  1 year 
C)  1.5 years 
D)  2 years 
A)  0.5 years 
B)  1 year 
C)  1.5 years 
D)  2 years

Question 5

The Rapanui people initiated the environmental disasters on Easter Island by first

Accepted Answer

A)  planting crops that required too much water. 
B)  overfishing the lagoons around the island. 
C)  removing protective vegetation and exposing the soil to increased erosion. 
D)  using resources to make statues instead of using these resources as fertilizer. 
A)  planting crops that required too much water. 
B)  overfishing the lagoons around the island. 
C)  removing protective vegetation and exposing the soil to increased erosion. 
D)  using resources to make statues instead of using these resources as fertilizer.

Question 6

The amount of productive land and water that individuals or populations require to provide their required resources and dispose of its wastes is called the

Accepted Answer

A)  sustainable area. 
B)  ecological footprint. 
C)  biological acreage. 
D)  environmental measure. 
A)  sustainable area. 
B)  ecological footprint. 
C)  biological acreage. 
D)  environmental measure.

Question 7

Although it happened long ago,the story of Easter Island should be of concern to modern man; in some ways,the Earth is like an island-all of its resources are confined by a boundary as significant as a shoreline.

Accepted Answer

A) True 
 B)False

Question 8

In 1978,a drought on the Galápagos Islands caused a reduction in the production of seeds that one of the finches,a type of bird,fed upon.This resulted in a decrease from 1,400 to 200 birds.Drought,in this specific situation,

Accepted Answer

A)  should not be considered a factor of the carrying capacity for these birds. 
B)  was a density-dependent factor affecting population density. 
C)  was a density-independent factor affecting population density. 
D)  resulted in a period of negative exponential growth for the bird population. 
A)  should not be considered a factor of the carrying capacity for these birds. 
B)  was a density-dependent factor affecting population density. 
C)  was a density-independent factor affecting population density. 
D)  resulted in a period of negative exponential growth for the bird population.

Question 9

The change in size of a given population of organisms may have a direct impact on humans.The 1993 outbreak of hantavirus in the southwestern United States was partly due to a(n)

Accepted Answer

A)  tightly linked cycle of human and hantavirus populations. 
B)  increase in the deer mouse population size. 
C)  decline in the desert salamander population, the normal hantavirus host. 
D)  increase in human population size. 
A)  tightly linked cycle of human and hantavirus populations. 
B)  increase in the deer mouse population size. 
C)  decline in the desert salamander population, the normal hantavirus host. 
D)  increase in human population size.

Question 10

A population will remain at a constant size when emigration equals immigration and

Accepted Answer

A)  food is not a limiting factor. 
B)  births equal deaths. 
C)  predators leave the area. 
D)  available space remains the same. 
A)  food is not a limiting factor. 
B)  births equal deaths. 
C)  predators leave the area. 
D)  available space remains the same.

Question 11

Using the environment in ways that can continue indefinitely,neither depleting essential resources nor causing environmental damage,is defined as ________ use.

Accepted Answer

The answer of Using the environment in ways that can...

Question 12

The type of growth that occurs when the population size increases by a constant proportion over time is known as ________.

Accepted Answer

The answer of The type of growth that occurs when...

Question 13

Exponential growth curves are always linear since the population grows at a constant proportion.

Accepted Answer

A) True 
 B)False

Question 14

One of the greatest concerns to ecologists today is the possibility that the current rate of human population growth will soon produce a human population that exceeds the ________ of our environment.

Accepted Answer

The answer of One of the greatest concerns to ecologists...

Question 15

Which of the following situations illustrates a link between the effects of density-dependent and density-independent factors?

Accepted Answer

A)  A flood causes a river to overflow and drown a herd of deer. 
B)  A drought occurs; a small herd of deer is able to survive, whereas a larger herd in the same area perishes. 
C)  A population of deer increases to a size at which individuals are competing with each other to get enough food. 
D)  None of the above are correct because density-dependent and density-independent factors cannot affect the same population of organisms at the same time. 
A)  A flood causes a river to overflow and drown a herd of deer. 
B)  A drought occurs; a small herd of deer is able to survive, whereas a larger herd in the same area perishes. 
C)  A population of deer increases to a size at which individuals are competing with each other to get enough food. 
D)  None of the above are correct because density-dependent and density-independent factors cannot affect the same population of organisms at the same time.

Question 16

As a component of its solution for overpopulation,China has imposed a policy that legally limits families to one child; China's government is attempting to manipulate which population factor?

Accepted Answer

A)  N 
B)  r 
C)  carrying capacity 
D)  food supply 
A)  N 
B)  r 
C)  carrying capacity 
D)  food supply

Question 17

Insects represent a highly nutritious and relatively inexpensive potential human food source.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following statements about carrying capacity is true?

Accepted Answer

A)  An S-shaped curve represents a population's ability to increase its numbers above the carrying capacity of its habitat. 
B)  J-shaped curves show the immediate limiting effect of carrying capacity on a newly introduced organism. 
C)  The carrying capacity is the same for all organisms in the same area. 
D)  The carrying capacity is established by the factor with the most limited availability. 
A)  An S-shaped curve represents a population's ability to increase its numbers above the carrying capacity of its habitat. 
B)  J-shaped curves show the immediate limiting effect of carrying capacity on a newly introduced organism. 
C)  The carrying capacity is the same for all organisms in the same area. 
D)  The carrying capacity is established by the factor with the most limited availability.

Question 19

A population can increase in size indefinitely.

Accepted Answer

A) True 
 B)False

Question 20

Bald eagle populations reached such low numbers in the 1960s that some biologists predicted their extinction in the continental United States; what action appears to have been most significant in reversing their decline?

Accepted Answer

A)  Eagle sanctuaries were established to provide protection for nesting eagles. 
B)  Bounties on eagle predators were enacted. 
C)  The use of DDT was banned in the United States. 
D)  Eagles were reared in captivity until reaching an age of self-sufficiency and then returned to the wild. 
A)  Eagle sanctuaries were established to provide protection for nesting eagles. 
B)  Bounties on eagle predators were enacted. 
C)  The use of DDT was banned in the United States. 
D)  Eagles were reared in captivity until reaching an age of self-sufficiency and then returned to the wild.

Exam 21: Growth of Populations

The carrying capacity of a population can be affected by weather,the daily fluctuations in temperature,rainfall,and the other factors that contribute to climate.

When population size is high,the rate of deaths related to disease,starvation,predator,and accidents increases; because their rates vary with population size,these mortality factors are considered ________.

For most populations,irregular fluctuations in size or density

A population is counted at 100 individuals in 1998.In 2006,a new count found 1,600 individuals.What is the doubling time for the population?

The Rapanui people initiated the environmental disasters on Easter Island by first

The amount of productive land and water that individuals or populations require to provide their required resources and dispose of its wastes is called the

Although it happened long ago,the story of Easter Island should be of concern to modern man; in some ways,the Earth is like an island-all of its resources are confined by a boundary as significant as a shoreline.

In 1978,a drought on the Galápagos Islands caused a reduction in the production of seeds that one of the finches,a type of bird,fed upon.This resulted in a decrease from 1,400 to 200 birds.Drought,in this specific situation,

The change in size of a given population of organisms may have a direct impact on humans.The 1993 outbreak of hantavirus in the southwestern United States was partly due to a(n)

A population will remain at a constant size when emigration equals immigration and

Using the environment in ways that can continue indefinitely,neither depleting essential resources nor causing environmental damage,is defined as ________ use.

The type of growth that occurs when the population size increases by a constant proportion over time is known as ________.

Exponential growth curves are always linear since the population grows at a constant proportion.

One of the greatest concerns to ecologists today is the possibility that the current rate of human population growth will soon produce a human population that exceeds the ________ of our environment.

Which of the following situations illustrates a link between the effects of density-dependent and density-independent factors?

As a component of its solution for overpopulation,China has imposed a policy that legally limits families to one child; China's government is attempting to manipulate which population factor?

Insects represent a highly nutritious and relatively inexpensive potential human food source.

Which of the following statements about carrying capacity is true?

A population can increase in size indefinitely.

Bald eagle populations reached such low numbers in the 1960s that some biologists predicted their extinction in the continental United States; what action appears to have been most significant in reversing their decline?

The Nature of Science and the Characteristics of Life

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Cell Structure and Internal Compartments

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Energy, Metabolism, and Enzymes

Photo Synthesis and Cellular Respiration

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How Evolution Works

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