Question 1

The following question refers to the figure below, which depicts the age structure populations.

In the figure, populations of a plant species labeled I, II, and III are depicted using simplified age structures containing three age classes: young seedlings, middle-aged juveniles, and older adults. Which population(s)  appear(s)  to have stable growth?

Accepted Answer

A)   I
B)   III
C)   I and II
D)   II and IIIE) B) and C)
F) All of the above

Question 2

Scientific study of the population cycles of the snowshoe hare and its predator, the lynx, has revealed that

Accepted Answer

A)   predation is the dominant factor affecting prey population cycling.
B)   hares and lynx are so mutually dependent that each species cannot survive without the other.
C)   both hare and lynx population sizes are affected mainly by abiotic factors.
D)   the hare population is r-selected and the lynx population is K-selected.E) C) and D)
F) B) and C)

Question 3

According to the logistic growth equation below,
 = rN

Accepted Answer

A)   the number of individuals added per unit time is greatest when N is close to zero.
B)   the per capita population growth rate increases as N approaches K.
C)   population growth is zero when N equals K.
D)   the population grows exponentially when K is small.E) B) and D)
F) None of the above

Question 4

Uniform spacing patterns in plants such as the creosote bush are most often associated with ________.

Accepted Answer

A)   patterns of high humidity
B)   the random distribution of seeds
C)   competitive interaction between individuals of the same population
D)   the concentration of nutrients within the population's rangeE) A) and D)
F) A) and C)

Question 5

Which pair of terms most accurately describes life history traits for a stable population of wolves?

Accepted Answer

A)   semelparous; r-selected
B)   semelparous; K-selected
C)   iteroparous; r-selected
D)   iteroparous; K-selectedE) A) and D)
F) A) and C)

Question 6

Suppose researchers marked 800 turtles and later were able to trap a total of 300 individuals in that population, of which 150 were marked. What is the estimate for total population size?

Accepted Answer

A)   200
B)   1,050
C)   1,600
D)   2,100E) B) and C)
F) A) and D)

Question 7

Use the table to answer the following question.

In the accompanying life table of a hypothetical population, what are the missing values for lₓ (y and z) ? lₓ = the proportion alive at the start of year (age specific survivorship rate) .

Accepted Answer

A)   y = 0.5, z = 0.5
B)   y = 1.0, z = 0.5
C)   y = 0.5, z = 0.1
D)   y = 1.0, z = 0.2E) C) and D)
F) All of the above

Question 8

The observation that members of a population are uniformly distributed suggests that

Accepted Answer

A)   resources are distributed unevenly.
B)   the members of the population are competing for access to a resource.
C)   the members of the population are neither attracted to nor repelled by one another.
D)   the density of the population is low.E) A) and C)
F) A) and B)

Question 9

Use the survivorship curves in the figure to answer the following question.

Which curve best describes survivorship in marine mollusks?

Accepted Answer

A)   A
B)   B
C)   C
D)   EE) All of the above
F) B) and C)

Question 10

Which of the following statements about human population in industrialized countries are correct?
I.Life history is r-selected.
II.The population has undergone the demographic transition.
III.The survivorship curve is Type III.
IV.Age distribution is relatively uniform.

Accepted Answer

A)   only I and III
B)   only II and IV
C)   only I, II, and IV
D)   only II, III, and IVE) A) and B)
F) B) and D)

Question 11

Which of the following graphs illustrates the population growth curve starting with a single bacterium growing in a flask of ideal medium at optimum temperature over a two-hour period? Assume resources do not become limiting over this time frame.

Accepted Answer

A)   
B)   
C)   
D)   E) A) and B)
F) B) and C)

Question 12

Which of the following is the most important assumption for the mark-recapture method to estimate the size of wildlife populations?

Accepted Answer

A)   More individuals emigrate from, as opposed to immigrate into, a population.
B)   Over 50% of the marked individuals were trapped during the recapture phase.
C)   There is a 50:50 ratio of males to females in the population before and after trapping and recapture.
D)   Marked individuals have the same probability of being recaptured as unmarked individuals during the recapture phase.E) B) and D)
F) B) and C)

Question 13

Which of the following statements regarding the future of populations in developing, less industrialized countries are correct?
I.The reproductive rates are predicted to remain below replacement level.
II. Survivorship will increase.
III.Overall population size will increase dramatically.
IV.The fertility rate is predicted to remain high, especially in some regions.

Accepted Answer

A)   only I and III
B)   only II and IV
C)   only II, III, and IV
D)   only I, II, and IIIE) B) and D)
F) A) and B)

Question 14

Which of the following statements about human populations in industrialized countries is incorrect?

Accepted Answer

A)   Birth rates and death rates are high.
B)   Average family size is relatively small.
C)   The population has undergone the demographic transition.
D)   The survivorship curve is Type I.E) A) and C)
F) B) and C)

Question 15

Which of the following assumptions must be made regarding the mark-recapture estimate of population size?
I. Marked and unmarked individuals have the same probability of being trapped.
II. The marked individuals have thoroughly mixed with the population after being marked.
III.No individuals have entered or left the population by immigration or emigration, and no individuals have been added by birth or eliminated by death during the course of the estimate.

Accepted Answer

A)   I only
B)   II only
C)   I and II only
D)   I, II, and IIIE) None of the above
F) B) and C)

Question 16

Use the graph to answer the following question.

In the figure, which of the arrows represents the carrying capacity?

Accepted Answer

A)   arrow A
B)   arrow B
C)   arrow C
D)   Carrying capacity cannot be found in the figure because species under density-dependent control never reach carrying capacity.E) None of the above
F) B) and D)

Question 17

Which of the following graphs illustrates the growth over several seasons of a population of snowshoe hares that were introduced to an appropriate habitat also inhabited by predators in northern Canada?

Accepted Answer

A)   
B)   
C)   
D)   E) B) and C)
F) A) and D)

Question 18

Use the graph to answer the following question.

Looking at the figure, what factor is contributing significantly to stabilizing the population size over time?
I. no migration
II. low migration
III.high migration

Accepted Answer

A)   only I
B)   only II
C)   only III
D)   only II and IIIE) A) and B)
F) B) and D)

Question 19

Use the figure to answer the following question.

The figure represents the dynamics of ________.

Accepted Answer

A)   metapopulations
B)   extinction
C)   emigration
D)   both extinction and emigrationE) All of the above
F) None of the above

Question 20

An ecologist recorded 12 white-tailed deer, Odocoileus virginianus, per square kilometer (km²)  in one woodlot and 20 km² in another woodlot. What was the ecologist comparing?

Accepted Answer

A)   density
B)   dispersion
C)   carrying capacity
D)   rangeE) B) and C)
F) C) and D)

Exam 53: Population Ecology

The observation that members of a population are uniformly distributed suggests that

Correct Answer
verified

Which of the following statements about human populations in industrialized countries is incorrect?

Correct Answer
verified

Which of the following statements about human population in industrialized countries are correct? I.Life history is r-selected. II.The population has undergone the demographic transition. III.The survivorship curve is Type III. IV.Age distribution is relatively uniform.

Correct Answer
verified

Which pair of terms most accurately describes life history traits for a stable population of wolves?

Correct Answer
verified

Suppose researchers marked 800 turtles and later were able to trap a total of 300 individuals in that population, of which 150 were marked. What is the estimate for total population size?

Correct Answer
verified

Correct Answer
verified

Uniform spacing patterns in plants such as the creosote bush are most often associated with ________.

Correct Answer
verified

An ecologist recorded 12 white-tailed deer, Odocoileus virginianus, per square kilometer (km²) in one woodlot and 20 km² in another woodlot. What was the ecologist comparing?

Correct Answer
verified

Scientific study of the population cycles of the snowshoe hare and its predator, the lynx, has revealed that

Correct Answer
verified

Use the graph to answer the following question. Looking at the figure, what factor is contributing significantly to stabilizing the population size over time? I. no migration II. low migration III.high migration

Correct Answer
verified

Use the graph to answer the following question. In the figure, which of the arrows represents the carrying capacity?

Correct Answer
verified

According to the logistic growth equation below, = rN

Correct Answer
verified

Use the survivorship curves in the figure to answer the following question. Which curve best describes survivorship in marine mollusks?

Correct Answer
verified

Which of the following graphs illustrates the population growth curve starting with a single bacterium growing in a flask of ideal medium at optimum temperature over a two-hour period? Assume resources do not become limiting over this time frame.

Correct Answer
verified

Correct Answer
verified

Use the figure to answer the following question. The figure represents the dynamics of ________.

Correct Answer
verified

Which of the following graphs illustrates the growth over several seasons of a population of snowshoe hares that were introduced to an appropriate habitat also inhabited by predators in northern Canada?

Correct Answer
verified

Which of the following is the most important assumption for the mark-recapture method to estimate the size of wildlife populations?

Correct Answer
verified

Correct Answer
verified

Use the table to answer the following question. In the accompanying life table of a hypothetical population, what are the missing values for lₓ (y and z) ? lₓ = the proportion alive at the start of year (age specific survivorship rate) .

Correct Answer
verified

Exam 53: Population Ecology

The observation that members of a population are uniformly distributed suggests that

Correct AnswerverifiedShow Answer

Which of the following statements about human populations in industrialized countries is incorrect?

Correct AnswerverifiedShow Answer

Which of the following statements about human population in industrialized countries are correct? I.Life history is r-selected. II.The population has undergone the demographic transition. III.The survivorship curve is Type III. IV.Age distribution is relatively uniform.

Correct AnswerverifiedShow Answer

Which pair of terms most accurately describes life history traits for a stable population of wolves?

Correct AnswerverifiedShow Answer

Suppose researchers marked 800 turtles and later were able to trap a total of 300 individuals in that population, of which 150 were marked. What is the estimate for total population size?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Uniform spacing patterns in plants such as the creosote bush are most often associated with ________.

Correct AnswerverifiedShow Answer

An ecologist recorded 12 white-tailed deer, Odocoileus virginianus, per square kilometer (km²) in one woodlot and 20 km² in another woodlot. What was the ecologist comparing?

Correct AnswerverifiedShow Answer

Scientific study of the population cycles of the snowshoe hare and its predator, the lynx, has revealed that

Correct AnswerverifiedShow Answer

Use the graph to answer the following question. Looking at the figure, what factor is contributing significantly to stabilizing the population size over time? I. no migration II. low migration III.high migration

Correct AnswerverifiedShow Answer

Use the graph to answer the following question. In the figure, which of the arrows represents the carrying capacity?

Correct AnswerverifiedShow Answer

According to the logistic growth equation below, = rN

Correct AnswerverifiedShow Answer

Use the survivorship curves in the figure to answer the following question. Which curve best describes survivorship in marine mollusks?

Correct AnswerverifiedShow Answer

Which of the following graphs illustrates the population growth curve starting with a single bacterium growing in a flask of ideal medium at optimum temperature over a two-hour period? Assume resources do not become limiting over this time frame.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Use the figure to answer the following question. The figure represents the dynamics of ________.

Correct AnswerverifiedShow Answer

Which of the following graphs illustrates the growth over several seasons of a population of snowshoe hares that were introduced to an appropriate habitat also inhabited by predators in northern Canada?

Correct AnswerverifiedShow Answer

Which of the following is the most important assumption for the mark-recapture method to estimate the size of wildlife populations?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Use the table to answer the following question. In the accompanying life table of a hypothetical population, what are the missing values for lₓ (y and z) ? lₓ = the proportion alive at the start of year (age specific survivorship rate) .

Correct AnswerverifiedShow Answer

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