Question 1

A forest fire would normally act as a density dependent factor on population size.

Accepted Answer

A) True 
 B)False

Question 2

Herbivory by rabbits on a grass species has an overall beneficial effect on the grass.

Accepted Answer

A) True 
 B)False

Question 3

A survivorship curve in which most individuals die late in life is a type _______ curve.

Accepted Answer

A)  IV
B)  III
C)  II
D)  I
E)  0IF) C) and D)
G) A) and D)

Question 4

What total fertility rate would be most likely to cause the human population size to be 5 billion in the year 2100?

Accepted Answer

A)  0
B)  2.8
C)  1.2
D)  1.5
E)  2.3F) B) and C)
G) A) and B)

Question 5

Examine the figure above.In 2010,what age group(s) made up the largest proportion of the population of France?

Accepted Answer

A)  65-100+
B)  35-64
C)  0-14
D)  15-34
E)  None,all age groups contain an equal proportion.F) A) and B)
G) None of the above

Question 6

Worldwide human population growth has been exponential since the Industrial Revolution.

Accepted Answer

A) True 
 B)False

Question 7

Resource partitioning enables species that are better competitors to exclude similar species from a community.

Accepted Answer

A) True 
 B)False

Question 8

The mimicry of coral snakes by scarlet king snakes is an example of Batesian mimicry.

Accepted Answer

A) True 
 B)False

Question 9

If 100 females of age class x produce 50 offspring,the contribution of age class x to the overall population growth rate is

Accepted Answer

A)  cannot be calculated;need total population size.
B)  0.5.
C)  2.
D)  50.
E)  cannot be calculated;need age specific survivorshipF) None of the above
G) A) and B)

Question 10

Secondary metabolites are produced to

Accepted Answer

A)  deter herbivores.
B)  deter competitors.
C)  aid in reproduction.
D)  aid in growth.
E)  mimic other species.F) D) and E)
G) B) and D)

Question 11

In a survey of Dall mountain sheep in Denali National Park in Alaska,researchers found that wolves preyed primarily on the most vulnerable members of the population,the young (pre-reproductive) and the old (post-reproductive) .What conclusion is best supported by this fact?

Accepted Answer

A)  A program should be established to cull the sheep population.
B)  Wolf predation is not dramatically reducing the sheep population.
C)  The wolf population is at its carrying capacity,so it is no threat to the sheep population.
D)  A program should be established to cull the wolf population.
E)  Wolf predation is dramatically reducing the sheep population.F) A) and B)
G) D) and E)

Question 12

In the formula,dN/dt = rN(K-N) /K,the rate of population growth approaches zero as

Accepted Answer

A)  carrying capacity approaches zero.
B)  the age-specific fertility rate approaches zero.
C)  the per capita growth rate declines.
D)  the population size approaches the carrying capacity.E) A) and B)
F) B) and C)

Question 13

A good sampling method for quantifying the density of birds or bats is the use of

Accepted Answer

A)  line transects.
B)  quadrats.
C)  pitfall traps.
D)  baited live traps.
E)  mist nets.F) B) and C)
G) A) and C)

Question 14

If you were given the task of choosing a biological control agent for a reed from China that has become invasive in the southeastern U.S. ,what do you think would be the best choice? Consider both the effectiveness and the safety of the agent you be releasing.

Accepted Answer

A)  A beetle that feeds upon both native and non-native reed species,and can consume massive quantities of the Chinese reed in a few weeks.
B)  A nematode (microscopic worm-like organism) ,native to China,that only eats the invasive reed species,but can take up to two years to kill a plant.
C)  A caterpillar,native to the U.S. ,that normally feeds upon a close relative of the invasive Chinese reed,but has been found in lab trials to prefer the Chinese reed.
D)  A fungal pathogen from China that is only known to infect the Chinese reed and can kill a plant in a few months.E) A) and B)
F) B) and D)

Question 15

In a growing population,the youngest age classes have

Accepted Answer

A)  the highest number of deaths/year.
B)  the fewest individuals.
C)  the most individuals.
D)  the smallest number of deaths/year.
E)  the most individuals and the largest number of deaths/year.F) All of the above
G) A) and C)

Question 16

What percentage of the population are under the age of 15 in West Africa?

Accepted Answer

A)  ~8.5
B)  ~25
C)  ~50
D)  ~65
E)  ~15F) A) and D)
G) None of the above

Question 17

Examine the figure above.What type of pattern does the human population exhibit through most of its history?

Accepted Answer

A)  logistic growth
B)  exponential growth
C)  zero growth (equilbrium) 
D)  negative growthE) None of the above
F) A) and B)

Question 18

You are studying the feeding habits of a group of four closely related bird species.You observe that all four species feed on insects.However,
You notice that the species do not feed at the same time of day: one species feeds most actively at dawn,another during the middle of the day,another at dusk,and the last species feeds at night.What term would you use to describe this behavior?

Accepted Answer

A)  competitive exclusion
B)  mutualism
C)  competition
D)  resource partitioning
E)  commensalismF) C) and E)
G) All of the above

Question 19

Chemical defenses are found only among animals.

Accepted Answer

A) True 
 B)False

Question 20

A mark-recapture program marked 10 individuals in the first catch.The second catch has a total of 8 individuals,4 of which were recaptures.What is the estimate of total population size?

Accepted Answer

A)  22
B)  24
C)  42
D)  20
E)  40F) B) and E)
G) All of the above

Exam 44: Population Ecology

In a survey of Dall mountain sheep in Denali National Park in Alaska,researchers found that wolves preyed primarily on the most vulnerable members of the population,the young (pre-reproductive) and the old (post-reproductive) .What conclusion is best supported by this fact?

Correct Answer
verified

Secondary metabolites are produced to

Correct Answer
verified

Examine the figure above.What type of pattern does the human population exhibit through most of its history?

Correct Answer
verified

Worldwide human population growth has been exponential since the Industrial Revolution.

Correct Answer
verified

A mark-recapture program marked 10 individuals in the first catch.The second catch has a total of 8 individuals,4 of which were recaptures.What is the estimate of total population size?

Correct Answer
verified

Resource partitioning enables species that are better competitors to exclude similar species from a community.

Correct Answer
verified

What percentage of the population are under the age of 15 in West Africa?

Correct Answer
verified

Chemical defenses are found only among animals.

Correct Answer
verified

If you were given the task of choosing a biological control agent for a reed from China that has become invasive in the southeastern U.S. ,what do you think would be the best choice? Consider both the effectiveness and the safety of the agent you be releasing.

Correct Answer
verified

A forest fire would normally act as a density dependent factor on population size.

Correct Answer
verified

A good sampling method for quantifying the density of birds or bats is the use of

Correct Answer
verified

The mimicry of coral snakes by scarlet king snakes is an example of Batesian mimicry.

Correct Answer
verified

Herbivory by rabbits on a grass species has an overall beneficial effect on the grass.

Correct Answer
verified

Correct Answer
verified

In the formula,dN/dt = rN(K-N) /K,the rate of population growth approaches zero as

Correct Answer
verified

In a growing population,the youngest age classes have

Correct Answer
verified

Examine the figure above.In 2010,what age group(s) made up the largest proportion of the population of France?

Correct Answer
verified

What total fertility rate would be most likely to cause the human population size to be 5 billion in the year 2100?

Correct Answer
verified

A survivorship curve in which most individuals die late in life is a type _______ curve.

Correct Answer
verified

If 100 females of age class x produce 50 offspring,the contribution of age class x to the overall population growth rate is

Correct Answer
verified

Exam 44: Population Ecology

In a survey of Dall mountain sheep in Denali National Park in Alaska,researchers found that wolves preyed primarily on the most vulnerable members of the population,the young (pre-reproductive) and the old (post-reproductive) .What conclusion is best supported by this fact?

Correct AnswerverifiedShow Answer

Secondary metabolites are produced to

Correct AnswerverifiedShow Answer

Examine the figure above.What type of pattern does the human population exhibit through most of its history?

Correct AnswerverifiedShow Answer

Worldwide human population growth has been exponential since the Industrial Revolution.

Correct AnswerverifiedShow Answer

A mark-recapture program marked 10 individuals in the first catch.The second catch has a total of 8 individuals,4 of which were recaptures.What is the estimate of total population size?

Correct AnswerverifiedShow Answer

Resource partitioning enables species that are better competitors to exclude similar species from a community.

Correct AnswerverifiedShow Answer

What percentage of the population are under the age of 15 in West Africa?

Correct AnswerverifiedShow Answer

Chemical defenses are found only among animals.

Correct AnswerverifiedShow Answer

If you were given the task of choosing a biological control agent for a reed from China that has become invasive in the southeastern U.S. ,what do you think would be the best choice? Consider both the effectiveness and the safety of the agent you be releasing.

Correct AnswerverifiedShow Answer

A forest fire would normally act as a density dependent factor on population size.

Correct AnswerverifiedShow Answer

A good sampling method for quantifying the density of birds or bats is the use of

Correct AnswerverifiedShow Answer

The mimicry of coral snakes by scarlet king snakes is an example of Batesian mimicry.

Correct AnswerverifiedShow Answer

Herbivory by rabbits on a grass species has an overall beneficial effect on the grass.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In the formula,dN/dt = rN(K-N) /K,the rate of population growth approaches zero as

Correct AnswerverifiedShow Answer

In a growing population,the youngest age classes have

Correct AnswerverifiedShow Answer

Examine the figure above.In 2010,what age group(s) made up the largest proportion of the population of France?

Correct AnswerverifiedShow Answer

What total fertility rate would be most likely to cause the human population size to be 5 billion in the year 2100?

Correct AnswerverifiedShow Answer

A survivorship curve in which most individuals die late in life is a type _______ curve.

Correct AnswerverifiedShow Answer

If 100 females of age class x produce 50 offspring,the contribution of age class x to the overall population growth rate is

Correct AnswerverifiedShow Answer

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