Question 1

The patterns and processes of changes in populations are called population

Accepted Answer

A)  structure. 
B)  demography. 
C)  density. 
D)  dispersion. 
E)  dynamics. 
A)  structure. 
B)  demography. 
C)  density. 
D)  dispersion. 
E)  dynamics.

Question 2

Which of the following was a conclusion drawn from experiments involving the manipulation of habitat patches of springtails that live on moss?

Accepted Answer

A)  Large populations are more vulnerable to extinction than small populations. 
B)  Even small barriers to recolonization raise extinction rates of subpopulations. 
C)  Corridors between patches of habitat increase extinction rates. 
D)  All of the above 
E)  None of the above 
A)  Large populations are more vulnerable to extinction than small populations. 
B)  Even small barriers to recolonization raise extinction rates of subpopulations. 
C)  Corridors between patches of habitat increase extinction rates. 
D)  All of the above 
E)  None of the above

Question 3

Use the following to answer questions :
Refer to the graph below.  
-Which of the following events is least likely to be true of this population?

Accepted Answer

A)  Parasites spread between population members. 
B)  Increased competition for food causes some individuals to delay reproduction. 
C)  The number of predators in the area varies with population density. 
D)  Territorial disputes lead to injury and death of some males. 
E)  Periods of extreme cold periodically reduce the population density. 
A)  Parasites spread between population members. 
B)  Increased competition for food causes some individuals to delay reproduction. 
C)  The number of predators in the area varies with population density. 
D)  Territorial disputes lead to injury and death of some males. 
E)  Periods of extreme cold periodically reduce the population density.

Question 4

Geographically distant events would likely have the most impact on populations of

Accepted Answer

A)  cedar trees. 
B)  migratory birds. 
C)  pine trees. 
D)  sedentary beetles. 
E)  minnows living in small isolated ponds. 
A)  cedar trees. 
B)  migratory birds. 
C)  pine trees. 
D)  sedentary beetles. 
E)  minnows living in small isolated ponds.

Question 5

An r-strategy species typically does not

Accepted Answer

A)  have semelparous reproduction. 
B)  tolerate a wide range of resource conditions. 
C)  provide parental care. 
D)  have a high intrinsic rate of increase. 
E)  produce large numbers of offspring. 
A)  have semelparous reproduction. 
B)  tolerate a wide range of resource conditions. 
C)  provide parental care. 
D)  have a high intrinsic rate of increase. 
E)  produce large numbers of offspring.

Question 6

Assume that a population of aphids follows the logistic equation for population growth. If the carrying capacity is 2,000 and the intrinsic rate of growth is 0.1 per day, at what population size will the rate of population growth be 0.05?

Accepted Answer

A)  1,000 
B)  1,500 
C)  2,000 
D)  3,000 
E)  20,000 
A)  1,000 
B)  1,500 
C)  2,000 
D)  3,000 
E)  20,000

Question 7

Which of the following statements about the cane toad is true?

Accepted Answer

A)  It has been able to control the populations of cane beetles in Australia. 
B)  It has become a pest in Australia. 
C)  It is not poisonous-that belief is a myth. 
D)  Both a and b 
E)  Both b and c 
A)  It has been able to control the populations of cane beetles in Australia. 
B)  It has become a pest in Australia. 
C)  It is not poisonous-that belief is a myth. 
D)  Both a and b 
E)  Both b and c

Question 8

Which of the following would likely have the highest population densities?

Accepted Answer

A)  Species A, which uses an abundant resource and has a large body size 
B)  Species B, which uses an abundant resource and has a small body size 
C)  Species C, which uses a scarce resource and has a large body size 
D)  Species D, which uses a scarce resource and has a small body size 
E)  Both a and c 
A)  Species A, which uses an abundant resource and has a large body size 
B)  Species B, which uses an abundant resource and has a small body size 
C)  Species C, which uses a scarce resource and has a large body size 
D)  Species D, which uses a scarce resource and has a small body size 
E)  Both a and c

Question 9

The best way to decrease the population size of a pest species is to

Accepted Answer

A)  poison it. 
B)  introduce additional predators. 
C)  decrease the carrying capacity of its habitat. 
D)  add competitors. 
E)  introduce a pathogen. 
A)  poison it. 
B)  introduce additional predators. 
C)  decrease the carrying capacity of its habitat. 
D)  add competitors. 
E)  introduce a pathogen.

Question 10

Density-dependent factors are population-regulating factors that

Accepted Answer

A)  affect the same proportion of individuals regardless of population size. 
B)  are usually weather-related. 
C)  affect only sessile organisms. 
D)  influence only fecundity. 
E)  have effects that vary depending on population size. 
A)  affect the same proportion of individuals regardless of population size. 
B)  are usually weather-related. 
C)  affect only sessile organisms. 
D)  influence only fecundity. 
E)  have effects that vary depending on population size.

Question 11

Which of the following would be unlikely to contribute to large fluctuations in population size?

Accepted Answer

A)  Frequent environmental disturbance 
B)  A high death rate 
C)  A density-dependent birth rate 
D)  A high birth rate 
E)  Seasonal variation in temperature 
A)  Frequent environmental disturbance 
B)  A high death rate 
C)  A density-dependent birth rate 
D)  A high birth rate 
E)  Seasonal variation in temperature

Question 12

Which of the following would most likely be used to estimate the population density of a very large population of relatively stationary salamanders?

Accepted Answer

A)  A full census 
B)  The mark-release method 
C)  A linear transect 
D)  Quadrats 
E)  None of the above 
A)  A full census 
B)  The mark-release method 
C)  A linear transect 
D)  Quadrats 
E)  None of the above

Question 13

For mobile organisms, the population density can be estimated by use of the _______ method, which involves the capturing and tagging of individuals.

Accepted Answer

The answer of For mobile organisms, the population density can...

Question 14

Use the following to answer questions:
Refer to the graph below.  
-In the graph, which of the expressions of the exponential growth equation would need to be increased for curve 1 to become more like curve 2?

Accepted Answer

A)  dN/dt 
B)  d 
C)  b 
D)  (b - d) 
E)  Either b or d 
A)  dN/dt 
B)  d 
C)  b 
D)  (b - d) 
E)  Either b or d

Question 15

If the birth rate is 0.07 and the death rate is 0.14, then the intrinsic rate of increase (assuming that there is no immigration or emigration)

Accepted Answer

A)  is negative. 
B)  is 0.07. 
C)  is 0.14. 
D)  is 0.21. 
E)  cannot be calculated. 
A)  is negative. 
B)  is 0.07. 
C)  is 0.14. 
D)  is 0.21. 
E)  cannot be calculated.

Question 16

The growth rate of a population in an unlimited environment

Accepted Answer

A)  is described by an S-shaped curve. 
B)  is greater than the intrinsic rate of increase. 
C)  is equal to (b - d)N. 
D)  depends on competition for resources. 
E)  is infinite. 
A)  is described by an S-shaped curve. 
B)  is greater than the intrinsic rate of increase. 
C)  is equal to (b - d)N. 
D)  depends on competition for resources. 
E)  is infinite.

Question 17

Which of the following would probably not be true of a K-strategist?

Accepted Answer

A)  A long life span 
B)  A Type III survivorship curve 
C)  Density-dependent mortality 
D)  A specialized diet 
E)  Iteroparity 
A)  A long life span 
B)  A Type III survivorship curve 
C)  Density-dependent mortality 
D)  A specialized diet 
E)  Iteroparity

Question 18

The dispersion pattern in which the presence of one individual increases the likelihood of another individual being nearby is

Accepted Answer

A)  random. 
B)  regular. 
C)  clumped. 
D)  uniform. 
E)  irregular. 
A)  random. 
B)  regular. 
C)  clumped. 
D)  uniform. 
E)  irregular.

Question 19

The way in which the individuals in a population are spread over the environment describes that population's

Accepted Answer

A)  dynamics. 
B)  regulation. 
C)  dispersion. 
D)  strategy. 
E)  survivorship. 
A)  dynamics. 
B)  regulation. 
C)  dispersion. 
D)  strategy. 
E)  survivorship.

Question 20

Populations that are most readily overharvested are characterized by having

Accepted Answer

A)  very long-lived adults. 
B)  short prereproductive periods and many offspring. 
C)  short prereproductive periods and few offspring. 
D)  long prereproductive periods and few offspring. 
E)  long prereproductive periods and many offspring. 
A)  very long-lived adults. 
B)  short prereproductive periods and many offspring. 
C)  short prereproductive periods and few offspring. 
D)  long prereproductive periods and few offspring. 
E)  long prereproductive periods and many offspring.

Exam 55: Population Ecology

The patterns and processes of changes in populations are called population

Which of the following was a conclusion drawn from experiments involving the manipulation of habitat patches of springtails that live on moss?

Use the following to answer questions : Refer to the graph below. -Which of the following events is least likely to be true of this population?

Geographically distant events would likely have the most impact on populations of

An r-strategy species typically does not

Assume that a population of aphids follows the logistic equation for population growth. If the carrying capacity is 2,000 and the intrinsic rate of growth is 0.1 per day, at what population size will the rate of population growth be 0.05?

Which of the following statements about the cane toad is true?

Which of the following would likely have the highest population densities?

The best way to decrease the population size of a pest species is to

Density-dependent factors are population-regulating factors that

Which of the following would be unlikely to contribute to large fluctuations in population size?

Which of the following would most likely be used to estimate the population density of a very large population of relatively stationary salamanders?

For mobile organisms, the population density can be estimated by use of the _______ method, which involves the capturing and tagging of individuals.

Use the following to answer questions: Refer to the graph below. -In the graph, which of the expressions of the exponential growth equation would need to be increased for curve 1 to become more like curve 2?

If the birth rate is 0.07 and the death rate is 0.14, then the intrinsic rate of increase (assuming that there is no immigration or emigration)

The growth rate of a population in an unlimited environment

Which of the following would probably not be true of a K-strategist?

The dispersion pattern in which the presence of one individual increases the likelihood of another individual being nearby is

The way in which the individuals in a population are spread over the environment describes that population's

Populations that are most readily overharvested are characterized by having

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