Question 1

Parasitism, competition, and predation are density independent factors that help control population size.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following factor(s)  limit(s)  exponential growth of a population?

Accepted Answer

A)   limited resource availability
B)   increases in predator populations
C)   competition between members
D)   competition with other species
E)   All of these choices limit exponential growth.F) None of the above
G) A) and C)

Question 3

Density-independent factors which play a role in regulating population size in nature include

Accepted Answer

A)   weather.
B)   natural disasters.
C)   geographical barriers.
D)   All of the choices are correct.E) B) and C)
F) A) and C)

Question 4

All of the following factors will keep a population from growing at its biotic potential EXCEPT

Accepted Answer

A)   limited supply of food and water.
B)   lack of availability of space.
C)   abundance of predators.
D)   prevalence of disease or parasites.
E)   successful reproduction of its members.F) D) and E)
G) B) and E)

Question 5

When the number of births plus immigration exceeds the number of deaths plus emigration, a population size will increase.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following lifestyle changes would have the greatest impact on reducing an individuals environmental impact?

Accepted Answer

A)   Reducing your meat consumption to once or twice a week.
B)   Buying a more fuel efficient vehicle and only using it when you are taking long trips instead of traveling locally.
C)   Downsizing and moving into a smaller house.
D)   Reducing the number of children in your household to reach a zero population growth rate.
E)   Waiting until later in life to have children and only have one per couple.F) A) and B)
G) All of the above E

Question 7

The particular place where an organism lives is its

Accepted Answer

A)   life zone.
B)   niche.
C)   ecosystem.
D)   community.
E)   habitat.F) C) and E)
G) C) and D)

Question 8

In the near future, the human population is predicted to involve

Accepted Answer

A)   a worldwide decrease in population growth due to limited resources.
B)   an increase in population growth in all countries in the world.
C)   a decrease in growth in most, but not all, more-developed countries and continued growth in most less-developed countries.
D)   a continuation of human population growth at the same pace as in the previous century.E) B) and D)
F) B) and C)

Question 9

Survivorship may be defined as the probability of newborn individuals of a cohort surviving to a particular age interval or as the proportion of the population surviving from the previous age interval.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following circumstances would cause exponential growth to move into a logistic growth phase?

Accepted Answer

A)   A reduction in the number of females within the population.
B)   A large increase in the population over three generations.
C)   The introduction of a non-native predator into the environment.
D)   Habitat alteration resulting in the conversion of 1200 acres of forests into agricultural fields and housing developments.
E)   All of these would cause exponential growth to move into logistic growth.F) All of the above
G) A) and E)

Question 11

Zero population growth will be achieved as soon as couples have only replacement reproduction, with two children per couple.

Accepted Answer

A) True 
 B)False

Question 12

Opportunistic species

Accepted Answer

A)   are composed of large individual organisms.
B)   are good dispersers and colonizers of new habitats.
C)   are slow to mature.
D)   have long life spans.
E)   are adapted to stable environments.F) A) and D)
G) C) and D) B

Question 13

In trying to limit the growth of a pest, you will have more success if you can reduce the carrying capacity of the environment rather than reduce the population size of the pest.

Accepted Answer

A) True 
 B)False

Question 14

Many species are held below the environmental carrying capacity by predation.

Accepted Answer

A) True 
 B)False

Question 15

Each species has a typical survivorship curve. Identify the labeled curves and briefly describe the typical survival rates and when death occurs. Give examples of organisms that have this type of survivorship curve.

Accepted Answer

<img  loading="lazy" src="/assets/images/blured-textbook.svg" class="d-inline m-1" alt="blured image" width="139" height="30"> "A" is a type I survivorship curve. A t...

Question 16

Population size levels off at the _______ of an environment.

Accepted Answer

A)   population growth
B)   biotic potential
C)   environmental resistance
D)   carrying capacityE) A) and C)
F) All of the above

Question 17

If the members of a population are small in size, mature early, and have high parity and fecundity, they are ______.

Accepted Answer

A)   K-strategists
B)   r-strategists
C)   neither K-strategists nor r-strategists, but have characteristics of both. If the members of a population are small in size, mature early, and have high parity and fecundity, they are r-strategists.D) A) and C)
E) A) and B)

Question 18

Since the population of the LDCs is still growing at a significant rate, one would correctly assume that the LDCs consume a much larger proportion of the Earth's resources.

Accepted Answer

A) True 
 B)False

Question 19

All of the following statements about population distribution are true EXCEPT

Accepted Answer

A)   population distribution is the pattern of dispersal of individuals across an area of interest.
B)   environmental conditions, such as climate and altitude, are often limiting factors of distribution.
C)   a population's distribution is calculated as the number of individuals per unit area.
D)   behavioral traits, such as territoriality, can affect the distribution pattern of a population.E) B) and C)
F) None of the above C

Question 20

Which variable is not a density-dependent factor?

Accepted Answer

A)   Competition between two male deer for territory.
B)   A red tailed hawk preying upon a population of field mice.
C)   Small pox outbreaks during the 1800's.
D)   An early cold spell that causes the plants in a given area to die off earlier than normal.E) A) and B)
F) None of the above

Exam 44: Population Ecology

Parasitism, competition, and predation are density independent factors that help control population size.

Correct AnswerverifiedShow Answer

Which of the following factor(s) limit(s) exponential growth of a population?

Correct AnswerverifiedShow Answer

Density-independent factors which play a role in regulating population size in nature include

Correct AnswerverifiedShow Answer

All of the following factors will keep a population from growing at its biotic potential EXCEPT

Correct AnswerverifiedShow Answer

When the number of births plus immigration exceeds the number of deaths plus emigration, a population size will increase.

Correct AnswerverifiedShow Answer

Which of the following lifestyle changes would have the greatest impact on reducing an individuals environmental impact?

Correct AnswerverifiedE

The particular place where an organism lives is its

Correct AnswerverifiedShow Answer

In the near future, the human population is predicted to involve

Correct AnswerverifiedShow Answer

Survivorship may be defined as the probability of newborn individuals of a cohort surviving to a particular age interval or as the proportion of the population surviving from the previous age interval.

Correct AnswerverifiedShow Answer

Which of the following circumstances would cause exponential growth to move into a logistic growth phase?

Correct AnswerverifiedShow Answer

Zero population growth will be achieved as soon as couples have only replacement reproduction, with two children per couple.

Correct AnswerverifiedShow Answer

Opportunistic species

Correct AnswerverifiedB

In trying to limit the growth of a pest, you will have more success if you can reduce the carrying capacity of the environment rather than reduce the population size of the pest.

Correct AnswerverifiedShow Answer

Many species are held below the environmental carrying capacity by predation.

Correct AnswerverifiedShow Answer

Each species has a typical survivorship curve. Identify the labeled curves and briefly describe the typical survival rates and when death occurs. Give examples of organisms that have this type of survivorship curve.

Correct Answerverified "A" is a type I survivorship curve. A t...View AnswerShow Answer

Population size levels off at the _______ of an environment.

Correct AnswerverifiedShow Answer

If the members of a population are small in size, mature early, and have high parity and fecundity, they are ______.

Correct AnswerverifiedShow Answer

Since the population of the LDCs is still growing at a significant rate, one would correctly assume that the LDCs consume a much larger proportion of the Earth's resources.

Correct AnswerverifiedShow Answer

All of the following statements about population distribution are true EXCEPT

Correct AnswerverifiedC

Which variable is not a density-dependent factor?

Correct AnswerverifiedShow Answer

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E

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B

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"A" is a type I survivorship curve. A t...
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C

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