Question 1

The sequence of decreased death rate followed by a decrease in birthrate is called

Accepted Answer

A)  environmental resistance.
B)  a limiting factor.
C)  doubling time coefficient.
D)  demographic transition.
E)  replacement reproduction.F) A) and D)
G) A) and C)

Question 2

The population growth rate is negative when

Accepted Answer

A)  birthrate is greater than death rate.
B)  death rate is greater than birthrate.
C)  all couples are married but average fewer than two children apiece.
D)  a country becomes poorer,because it is related to economic growth.
E)  better health care reduces the death rate and increases survivorship of newborns.F) C) and E)
G) A) and E)

Question 3

Researchers have discovered that there is a small remnant population of endangered bluegrass left in a small prairie plot outside of Kansas City.If there are approximately 850 individuals in the cohort,how many individuals can the researchers expect to find alive at the end of the summer,6 months later?

Accepted Answer

A)  approximately 1,000
B)  approximately 330
C)  approximately 700
D)  approximately 45
E)  None of the individuals will be alive 6 months later.F) D) and E)
G) None of the above

Question 4

Most species are intermediate between r-strategists and K-strategists,and tend to have a type II survivorship curve.

Accepted Answer

A) True 
 B)False  True

Question 5

Population size levels off at the ________ of an environment.

Accepted Answer

A)  population growth
B)  biotic potential
C)  environmental resistance
D)  carrying capacityE) None of the above
F) All of the above

Question 6

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 7

A(n) ________ consists of all the populations of multiple species interacting in a designated region.

Accepted Answer

A)  ecosystem
B)  community
C)  biosphere
D)  None of the choices are correct.E) None of the above
F) A) and B)

Question 8

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 1,200 acres of forests into agricultural fields and housing developments
E)  All of these would cause exponential growth to move into logistic growth.F) A) and E)
G) A) and D) E

Question 9

Only the LDCs will be experiencing overpopulation growth in the near future.

Accepted Answer

A) True 
 B)False

Question 10

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) All of the above
F) C) and D)

Question 11

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.D) A) and C)
E) A) and B)

Question 12

Farmers sprayed litchi trees to suppress populations of scale insects.However,the spray also killed populations of a predatory lacewing that controlled the scales.Soon the spraying did no good,and the damage to the litchi from the scales was greater than before spraying had occurred.Few predatory lacewings exist in the trees now because

Accepted Answer

A)  they,too,are insects so they are r-selected.
B)  the scale insect was K-selected and the high number of young included a resistant strain,while the predator was r-selected and will take longer to produce a resistant variety.
C)  the predator was r-selected and was therefore more susceptible to the spray.
D)  the scale insect was r-selected and the high number of young included a resistant strain; the predator was K-selected and will take longer to produce a resistant variety.E) B) and D)
F) A) and B)

Question 13

Tell what type of growth model is depicted in the graph and describe the factors that must be met for a population to experience this type of growth.Identify the labeled phases,"A" and "B," and briefly explain what occurs during these phases.

Accepted Answer

Answers may vary.This is an exponential ...

Question 14

A population in which death rates are higher than birth rates,and the prereproductive group is smaller than the reproductive group,is best represented by an age structure diagram with a(n) ________-shape.

Accepted Answer

A)  bell
B)  urn
C)  pyramid
D)  S
E)  JF) B) and C)
G) A) and B)

Question 15

In the logistic growth curve formula,when N is very large,(K-N) /N is almost equal to 0,which results in

Accepted Answer

A)  the population growing as fast as it can,or r(N) .
B)  the population growth slowing to zero.
C)  the population exceeding carrying capacity; more are dying due to starvation than are born.
D)  the population going extinct.
E)  You can't tell without knowing the value of r (rate of reproduction) .F) None of the above
G) A) and D)

Question 16

Which of the following lifestyle changes would have the greatest impact on reducing an individual's 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 having one per couple.F) B) and E)
G) A) and C)

Question 17

When discussing population features,a cohort is described as

Accepted Answer

A)  all the individuals in a population born at the same time.
B)  all individuals living in the same habitat.
C)  all the different species in a community.
D)  all the organisms interacting in the ecosystem.
E)  All of the choices are correct.F) B) and E)
G) C) and D)

Question 18

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 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) A) and C)
F) A) and B) C

Question 20

How is environmental impact measured in a population?

Accepted Answer

A)  population size and resource consumption
B)  population size and resource production
C)  number of individuals dying each generation plus birthrates
D)  All of these are used to measure environmental impact.
E)  None of these are used to measure environmental impact.F) None of the above
G) A) and C)

Exam 44: Population Ecology

The sequence of decreased death rate followed by a decrease in birthrate is called

Correct Answer
verified

The population growth rate is negative when

Correct Answer
verified

Correct Answer
verified

Most species are intermediate between r-strategists and K-strategists,and tend to have a type II survivorship curve.

Correct Answer
verified
True

Population size levels off at the ________ of an environment.

Correct Answer
verified

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 Answer
verified

A(n) ________ consists of all the populations of multiple species interacting in a designated region.

Correct Answer
verified

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

Correct Answer
verified
E

Only the LDCs will be experiencing overpopulation growth in the near future.

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Tell what type of growth model is depicted in the graph and describe the factors that must be met for a population to experience this type of growth.Identify the labeled phases,"A" and "B," and briefly explain what occurs during these phases.

Correct Answer
verified
Answers may vary.This is an exponential ...
View Answer

A population in which death rates are higher than birth rates,and the prereproductive group is smaller than the reproductive group,is best represented by an age structure diagram with a(n) ________-shape.

Correct Answer
verified

In the logistic growth curve formula,when N is very large,(K-N) /N is almost equal to 0,which results in

Correct Answer
verified

Which of the following lifestyle changes would have the greatest impact on reducing an individual's environmental impact?

Correct Answer
verified

When discussing population features,a cohort is described as

Correct Answer
verified

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 Answer
verified

All of the following statements about population distribution are true EXCEPT

Correct Answer
verified
C

How is environmental impact measured in a population?

Correct Answer
verified

Exam 44: Population Ecology

The sequence of decreased death rate followed by a decrease in birthrate is called

Correct AnswerverifiedShow Answer

The population growth rate is negative when

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Most species are intermediate between r-strategists and K-strategists,and tend to have a type II survivorship curve.

Correct AnswerverifiedTrue

Population size levels off at the ________ of an environment.

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

A(n) ________ consists of all the populations of multiple species interacting in a designated region.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedE

Only the LDCs will be experiencing overpopulation growth in the near future.

Correct AnswerverifiedShow Answer

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

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

Correct AnswerverifiedShow Answer

Tell what type of growth model is depicted in the graph and describe the factors that must be met for a population to experience this type of growth.Identify the labeled phases,"A" and "B," and briefly explain what occurs during these phases.

Correct AnswerverifiedAnswers may vary.This is an exponential ...View AnswerShow Answer

A population in which death rates are higher than birth rates,and the prereproductive group is smaller than the reproductive group,is best represented by an age structure diagram with a(n) ________-shape.

Correct AnswerverifiedShow Answer

In the logistic growth curve formula,when N is very large,(K-N) /N is almost equal to 0,which results in

Correct AnswerverifiedShow Answer

Which of the following lifestyle changes would have the greatest impact on reducing an individual's environmental impact?

Correct AnswerverifiedShow Answer

When discussing population features,a cohort is described as

Correct AnswerverifiedShow Answer

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

All of the following statements about population distribution are true EXCEPT

Correct AnswerverifiedC

How is environmental impact measured in a population?

Correct AnswerverifiedShow Answer

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True

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E

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Answers may vary.This is an exponential ...
View Answer

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C

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