Question 1

Which of the following statements about efforts to introduce large mammals to small isolated islands is true?

Accepted Answer

A)   The populations never become established and invariably go extinct within a decade or two.
B)   Such efforts always result in an initial population explosion, but then there is a crash.
C)   Such efforts always succeed and result in the formation of stable populations.
D)   Such efforts always result in populations with cyclical population dynamics.
E)   None of the aboveF) A) and D)
G) None of the above

Question 2

The proportion of individuals alive at the start of a time period, divided by the total number born, is known as the _______.

Accepted Answer

The answer of The proportion of individuals alive at the...

Question 3

If the death rate in a population is unrelated to the number of individuals in an area, the resulting change in population size is said to be _______.

Accepted Answer

The answer of If the death rate in a population...

Question 4

Draw and explain survivorship curves characteristic of humans in a wealthy country, wild birds, and a typical plant.

Accepted Answer

Survivorship curves are graphical repres...

Question 5

The larger population that comprises many subpopulations is known as a

Accepted Answer

A)   habitat patch.
B)   metapopulation.
C)   megapopulation.
D)   population structure.
E)   None of the aboveF) None of the above
G) C) and E)

Question 6

Which of the following represents the correct ranking of dispersal patterns, from the greatest to least expected difference between one individual and its nearest neighbor?

Accepted Answer

A)   Random, clumped, regular
B)   Random, regular, clumped
C)   Regular, random, clumped
D)   Regular, clumped, random
E)   Clumped, regular, randomF) C) and D)
G) A) and D)

Question 7

If the intrinsic rate of growth of a population is zero, then the population

Accepted Answer

A)   is extinct.
B)   will soon be extinct.
C)   is increasing in size.
D)   is decreasing in size.
E)   is stable in size.F) B) and E)
G) All of the above

Question 8

Use the following to answer questions :
Refer to the graph below, showing the mortality rate of two species of mammals over the course of 9 months. 
-Based on the mortality graph, which type of survivorship curve does species A have?

Accepted Answer

A)   Ecological
B)   Genetic
C)   Maturational
D)   Physiological
E)   LogisticF) B) and C)
G) A) and B)

Question 9

How does the age structure of a country's population affect its potential for future population growth? In your answer, contrast an industrialized country such as Germany with a developing country such as Uganda (see Figure 55.15).

Accepted Answer

Because a high proportion of the German ...

Question 10

The ability of migrants from one subpopulation to prevent another subpopulation from going extinct is known as the _______.

Accepted Answer

The answer of The ability of migrants from one subpopulation...

Question 11

If a total of 2,400 oak trees are counted in a 6 km  ×	imes×  2 km rectangular patch of land, the density of the oak trees is _______ per square km.

Accepted Answer

A)   24
B)   48
C)   96
D)   120
E)   200 F) A) and C)
G) A) and B)

Question 12

Use the following to answer questions :
Refer to the graph below, showing the population growth of two different colonies of 65 rabbits each over 10 years. 
-What type of population growth is occurring in population B? If it is logistic, what is the carrying capacity?

Accepted Answer

The answer of Use the following to answer questions :
Refer...

Question 13

Which of the following conditions would not bias the estimates made from a capture-mark-recapture study?

Accepted Answer

A)   Movement of individuals away from the study site
B)   Greater susceptibility of marked individuals to predation
C)   Free intermingling of marked individuals with unmarked individuals
D)   Marked individuals' preference for traps
E)   None of the aboveF) A) and B)
G) A) and C)

Question 14

Which pattern of survivorship is most likely for an organism such as the sea urchin, which produces large numbers of very small offspring and provides no parental care?

Accepted Answer

A)   Most offspring survive for most of their potential life span and then die at the same time.
B)   The probability of death is low throughout the life span.
C)   Survivorship is high early in life and declines slowly.
D)   Young individuals have a high probability of dying, but older individuals have a relatively low probability of dying.
E)   The probability of death is equally high throughout the potential life span.F) B) and C)
G) None of the above

Question 15

A group of individuals all born in the same time period constitutes a _______.

Accepted Answer

The answer of A group of individuals all born in...

Question 16

Which of the following statements is an example of a density-independent effect?

Accepted Answer

A)   The number of nests in an area is limited to 70.
B)   The incidence of malaria increases as populations increase.
C)   Drought kills seedlings.
D)   Large aggregations of guppies attract predators.
E)   None of the aboveF) A) and B)
G) A) and E)

Question 17

A population of water fleas in one pond has been declining. A storm leads to the migration of a few individuals from another pond into the original subpopulation, and the new migrants help prevent the original population from going extinct. This is an example of

Accepted Answer

A)   environmental carrying capacity.
B)   compensation.
C)   the rescue effect.
D)   density-independent factors.
E)   habitat selection.F) All of the above
G) C) and D)

Question 18

Species with a roughly constant mortality rate (such as many birds) are said to have a Type _______, or _______, survivorship curve.

Accepted Answer

The answer of Species with a roughly constant mortality rate...

Question 19

The process by which immigrants prevent a subpopulation from becoming extinct is called the

Accepted Answer

A)   colonization effect.
B)   rescue effect.
C)   metapopulation effect.
D)   genetic drift effect.
E)   salvage effect.F) A) and D)
G) D) and E)

Question 20

Which of the following would probably not be true of a population whose dynamics are primarily influenced by density-independent factors?

Accepted Answer

A)   A growth pattern that is similar to the logistic growth curve
B)   A birth rate that is dependent on the nutritional status of its adult females
C)   The highest percentage of deaths caused by unfavorable weather conditions
D)   Both a and b
E)   All of the aboveF) All of the above
G) C) and D)

Exam 55: Population Ecology

The process by which immigrants prevent a subpopulation from becoming extinct is called the

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The larger population that comprises many subpopulations is known as a

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The proportion of individuals alive at the start of a time period, divided by the total number born, is known as the _______.

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Which of the following would probably not be true of a population whose dynamics are primarily influenced by density-independent factors?

Correct AnswerverifiedShow Answer

Species with a roughly constant mortality rate (such as many birds) are said to have a Type _______, or _______, survivorship curve.

Correct AnswerverifiedShow Answer

Which pattern of survivorship is most likely for an organism such as the sea urchin, which produces large numbers of very small offspring and provides no parental care?

Correct AnswerverifiedShow Answer

If the death rate in a population is unrelated to the number of individuals in an area, the resulting change in population size is said to be _______.

Correct AnswerverifiedShow Answer

Which of the following statements about efforts to introduce large mammals to small isolated islands is true?

Correct AnswerverifiedShow Answer

How does the age structure of a country's population affect its potential for future population growth? In your answer, contrast an industrialized country such as Germany with a developing country such as Uganda (see Figure 55.15).

Correct AnswerverifiedBecause a high proportion of the German ...View AnswerShow Answer

If a total of 2,400 oak trees are counted in a 6 km ×\times× 2 km rectangular patch of land, the density of the oak trees is _______ per square km.

Correct AnswerverifiedShow Answer

Use the following to answer questions : Refer to the graph below, showing the population growth of two different colonies of 65 rabbits each over 10 years. -What type of population growth is occurring in population B? If it is logistic, what is the carrying capacity?

Correct AnswerverifiedShow Answer

If the intrinsic rate of growth of a population is zero, then the population

Correct AnswerverifiedShow Answer

Which of the following conditions would not bias the estimates made from a capture-mark-recapture study?

Correct AnswerverifiedShow Answer

Draw and explain survivorship curves characteristic of humans in a wealthy country, wild birds, and a typical plant.

Correct AnswerAnswered by ExamLex AISurvivorship curves are graphical repres...View AnswerShow Answer

The ability of migrants from one subpopulation to prevent another subpopulation from going extinct is known as the _______.

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Which of the following statements is an example of a density-independent effect?

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A group of individuals all born in the same time period constitutes a _______.

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A population of water fleas in one pond has been declining. A storm leads to the migration of a few individuals from another pond into the original subpopulation, and the new migrants help prevent the original population from going extinct. This is an example of

Correct AnswerverifiedShow Answer

Use the following to answer questions : Refer to the graph below, showing the mortality rate of two species of mammals over the course of 9 months. -Based on the mortality graph, which type of survivorship curve does species A have?

Correct AnswerverifiedShow Answer

Which of the following represents the correct ranking of dispersal patterns, from the greatest to least expected difference between one individual and its nearest neighbor?

Correct AnswerverifiedShow Answer

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Species with a roughly constant mortality rate (such as many birds) are said to have a Type _, or _, survivorship curve.

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Because a high proportion of the German ...
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If a total of 2,400 oak trees are counted in a 6 km $\times$ 2 km rectangular patch of land, the density of the oak trees is _______ per square km.

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Survivorship curves are graphical repres...
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