Question 1

Carrying capacity is

Accepted Answer

A)   seldom reached by marine producers and consumers because of the vast resources of the ocean.
B)   the maximum population size that a particular environment can support.
C)   fixed for most species over most of their range most of the time.
D)   determined by density and dispersion data.
E)   the term used to describe the stress a population undergoes due to limited resources.

Question 2

A population is correctly defined as having which of the following characteristics?
I.inhabiting the same general area
II.belonging to the same species
III.possessing a constant and uniform density and dispersion

Accepted Answer

A)   I only
B)   III only
C)   I and II only
D)   II and III only
E)   I, II, and III

Question 3

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

Accepted Answer

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

Question 4

Starting from a single individual, what is the size of a population of bacteria that reproduce by binary fission every 20 minutes at the end of a 2-hour time period? (Assume unlimited resources and no mortality.)

Accepted Answer

A)   6
B)   18
C)   128
D)   512
E)   1,024

Question 5

Which of the following was the most significant limiting factor in human population growth in the 20th century?

Accepted Answer

A)   famine
B)   non-HIV disease
C)   HIV
D)   genocide
E)   clean water

Question 6

The following questions refer to Figure 53.3, which depicts the age structure of three populations.
  
Figure 53.3
-Which population(s) appear(s) to be stable?

Accepted Answer

A)   I
B)   II
C)   III
D)   I and II
E)   II and III

Question 7

During the spring, you are studying the mice that live in a field near your home. The population density is high, but you realize that you rarely observe any reproductive female mice. This most likely indicates

Accepted Answer

A)   that there is selective predation on female mice.
B)   that female mice die before reproducing.
C)   that this habitat is a good place for mice to reproduce.
D)   that you are observing immigrant mice.
E)   that the breeding season is over.

Question 8

Which of the following groups would be most likely to exhibit uniform dispersion?

Accepted Answer

A)   red squirrels, who actively defend territories
B)   cattails, which grow primarily at edges of lakes and streams
C)   dwarf mistletoes, which parasitize particular species of forest tree
D)   moths, in a city at night
E)   lake trout, which seek out cold, deep water high in dissolved oxygen

Question 9

Which of the following graphs illustrates the population growth curve of single bacterium growing in a flask of ideal medium at optimum temperature over a 24-hour period?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 10

In which of the following situations would you expect to find the largest number of K-selected individuals?

Accepted Answer

A)   a recently abandoned agricultural field in Ohio
B)   the sand dune communities of south Lake Michigan
C)   the flora and fauna of a coral reef in the Caribbean
D)   South Florida after a hurricane
E)   a newly emergent volcanic island

Question 11

To construct a reproductive table for a sexual species, one needs to

Accepted Answer

A)   assess sperm viability for the males in the population.
B)   keep track of all of the offspring of a cohort.
C)   keep track of the females in a cohort.
D)   keep track of all of the offspring of the females in a cohort.
E)   analyze the ratio of deaths to births in a cohort.

Question 12

The following questions refer to Figure 53.3, which depicts the age structure of three populations.
  
Figure 53.3
-Assuming these age-structure diagrams describe human populations, which population(s) is (are) likely to experience zero population growth (ZPG) ?

Accepted Answer

A)   I
B)   II
C)   III
D)   I and II
E)   II and III

Question 13

Which of the following assumptions have to be made regarding the capture-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)   II and III only
E)   I, II, and III

Question 14

Which variables define the ecological life history of a species?

Accepted Answer

A)   the age at which reproduction begins, frequency of reproduction, and the number of offspring for each reproductive episode
B)   the ratio of females to males, the length of the breeding season, and the number of offspring for each reproductive episode
C)   the number of offspring produced over a lifetime by a breeding pair and the survivability of the offspring
D)   timing breeding sessions with optimal environmental conditions and the number of offspring produced during each breeding session
E)   the amount of parental care given after birth, the number of reproductive episodes per year, and the number of years females are capable of producing viable offspring

Question 15

Based on current growth rates, Earth's human population in 2012 will be closest to

Accepted Answer

A)   2 million.
B)   3 billion.
C)   4 billion.
D)   7 billion.
E)   10 billion.

Question 16

Often the growth cycle of one population has an effect on the cycle of another. As moose populations increase, for example, wolf populations also increase. Thus, if we are considering the logistic equation for the wolf population,
DN/dt = rN  ,
which of the factors accounts for the effect on the moose population?

Accepted Answer

A)   r
B)   N
C)   rN
D)   K
E)   dt

Question 17

Which of the following is most likely to contribute to density-dependent regulation of populations?

Accepted Answer

A)   the removal of toxic waste by decomposers
B)   intraspecific competition for nutrients
C)   earthquakes
D)   floods
E)   fires

Question 18

In models of logistic population growth,

Accepted Answer

A)   the population growth rate slows dramatically as N approaches K.
B)   new individuals are added to the population most rapidly at the beginning of the population's growth.
C)   new individuals are added to the population as N approaches K.
D)   only density-dependent factors affect the rate of population growth.
E)   carrying capacity is never reached.

Question 19

Why does the 2009 U.S. population continue to grow even though the United States has essentially established a ZPG?

Accepted Answer

A)   emigration
B)   immigration
C)   better sanitation
D)   baby boomer reproduction
E)   the 2007-2009 economic recession

Exam 53: Population Ecology

Which variables define the ecological life history of a species?

Correct Answer
verified

Correct Answer
verified

Which of the following was the most significant limiting factor in human population growth in the 20th century?

Correct Answer
verified

Which of the following is most likely to contribute to density-dependent regulation of populations?

Correct Answer
verified

In which of the following situations would you expect to find the largest number of K-selected individuals?

Correct Answer
verified

During the spring, you are studying the mice that live in a field near your home. The population density is high, but you realize that you rarely observe any reproductive female mice. This most likely indicates

Correct Answer
verified

The following questions refer to Figure 53.3, which depicts the age structure of three populations. Figure 53.3 -Assuming these age-structure diagrams describe human populations, which population(s) is (are) likely to experience zero population growth (ZPG) ?

Correct Answer
verified

Based on current growth rates, Earth's human population in 2012 will be closest to

Correct Answer
verified

A population is correctly defined as having which of the following characteristics? I.inhabiting the same general area II.belonging to the same species III.possessing a constant and uniform density and dispersion

Correct Answer
verified

Why does the 2009 U.S. population continue to grow even though the United States has essentially established a ZPG?

Correct Answer
verified

In models of logistic population growth,

Correct Answer
verified

The following questions refer to Figure 53.3, which depicts the age structure of three populations. Figure 53.3 -Which population(s) appear(s) to be stable?

Correct Answer
verified

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

Correct Answer
verified

Which of the following graphs illustrates the population growth curve of single bacterium growing in a flask of ideal medium at optimum temperature over a 24-hour period?

Correct Answer
verified

Carrying capacity is

Correct Answer
verified

To construct a reproductive table for a sexual species, one needs to

Correct Answer
verified

Which of the following groups would be most likely to exhibit uniform dispersion?

Correct Answer
verified

Correct Answer
verified

Starting from a single individual, what is the size of a population of bacteria that reproduce by binary fission every 20 minutes at the end of a 2-hour time period? (Assume unlimited resources and no mortality.)

Correct Answer
verified

Exam 53: Population Ecology

Which variables define the ecological life history of a species?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following was the most significant limiting factor in human population growth in the 20th century?

Correct AnswerverifiedShow Answer

Which of the following is most likely to contribute to density-dependent regulation of populations?

Correct AnswerverifiedShow Answer

In which of the following situations would you expect to find the largest number of K-selected individuals?

Correct AnswerverifiedShow Answer

During the spring, you are studying the mice that live in a field near your home. The population density is high, but you realize that you rarely observe any reproductive female mice. This most likely indicates

Correct AnswerverifiedShow Answer

The following questions refer to Figure 53.3, which depicts the age structure of three populations. Figure 53.3 -Assuming these age-structure diagrams describe human populations, which population(s) is (are) likely to experience zero population growth (ZPG) ?

Correct AnswerverifiedShow Answer

Based on current growth rates, Earth's human population in 2012 will be closest to

Correct AnswerverifiedShow Answer

A population is correctly defined as having which of the following characteristics? I.inhabiting the same general area II.belonging to the same species III.possessing a constant and uniform density and dispersion

Correct AnswerverifiedShow Answer

Why does the 2009 U.S. population continue to grow even though the United States has essentially established a ZPG?

Correct AnswerverifiedShow Answer

In models of logistic population growth,

Correct AnswerverifiedShow Answer

The following questions refer to Figure 53.3, which depicts the age structure of three populations. Figure 53.3 -Which population(s) appear(s) to be stable?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following graphs illustrates the population growth curve of single bacterium growing in a flask of ideal medium at optimum temperature over a 24-hour period?

Correct AnswerverifiedShow Answer

Carrying capacity is

Correct AnswerverifiedShow Answer

To construct a reproductive table for a sexual species, one needs to

Correct AnswerverifiedShow Answer

Which of the following groups would be most likely to exhibit uniform dispersion?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Starting from a single individual, what is the size of a population of bacteria that reproduce by binary fission every 20 minutes at the end of a 2-hour time period? (Assume unlimited resources and no mortality.)

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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