Question 1

The basic level of an ecological study always begins by looking at how populations interact with each other.

Accepted Answer

A) True 
 B)False

Question 2

What is the expected pattern of growth for a population that has a birthrate that is higher than the death rate?

Accepted Answer

A)   This population can expect to see a pyramid-shaped diagram that will cause the population to grow in the near future.
B)   This population can expect to see an urn-shaped diagram that will cause the population to grow in the future.
C)   This population can expect to see a bell-shaped diagram that will cause the population to grow in the future.
D)   This population can expect to see an pyramid-shaped diagram that will cause the population to decrease in the future.
E)   This population can expect to move into a logistic growth curve in the near future.F) A) and B)
G) None of the above

Question 3

A type II survivorship curve, drawn by plotting the number of individuals in a given population alive at the beginning of each age interval, is characterized by

Accepted Answer

A)   most individuals dying of old age.
B)   many individuals dying early in life.
C)   individuals dying at a constant rate throughout time.
D)   most individuals dying during their reproductive years.E) A) and C)
F) None of the above

Question 4

How is environmental impact measured in a population?

Accepted Answer

A)   Population size and resource consumption.
B)   Population size and resource production.
C)   Number of individuals dying each generation plus birth rates.
D)   All of these are used to measure environmental impact.
E)   None of these are used to measure environmental impact.F) C) and D)
G) D) and E)

Question 5

When discussing population features a cohort is described as

Accepted Answer

A)   all the individuals in a population born at the same time.
B)   all individuals living in the same habitat.
C)   all the different species in a community.
D)   all the organisms interacting in the ecosystem.
E)   All of the choices are correct.F) A) and C)
G) A) and E)

Question 6

Which of the following studies would lie outside of an ecologists skill set?

Accepted Answer

A)   Studying the progression of an outbreak of HIV in sub Sahara Africa.
B)   Developing a management plan for the preservation of an endangered species.
C)   Proposal to develop a solar power field on the edge of a major urban area.
D)   Management plan to clean up a section of the Mississippi River that has become polluted due to sewage discharge.
E)   All of these are part of an ecologists skill set.F) C) and D)
G) B) and D)

Question 7

In the logistic growth curve formula, when N is very large, (K-N) /N is almost equal to 0, which results in

Accepted Answer

A)   the population growing as fast as it can, or r(N) .
B)   the population growth slowing to zero.
C)   the population exceeding carrying capacity; more are dying due to starvation than are born.
D)   the population going extinct.
E)   You can't tell without knowing the value of r (rate of reproduction) .F) D) and E)
G) A) and B)

Question 8

A population in which death rates are higher than birth rates, and the prereproductive group is smaller than the reproductive group, is best represented by an age structure diagram with a(n)  ______ -shape.

Accepted Answer

A)   bell
B)   urn
C)   pyramid
D)   S
E)   JF) B) and C)
G) C) and D)

Question 9

Consider that a species of salmon lays 20,000 eggs per pair when it spawns and dies. At the end of five years, an average of one pair of mature salmon from this group of hatched eggs returns again to spawn in the parent stream (19,998 have not survived) . What is the growth rate of this population?

Accepted Answer

A)   10,000, because there were that many eggs produced per parent fish (r) 
B)   2,000, because this must be divided by five years
C)   zero, because there is exact replacement of the previous generation
D)   2,000, because there was this much average die-off per year
E)   19,998, because there was this much total lossF) A) and B)
G) A) and C)

Question 10

Only the LDC's will be experiencing overpopulation growth in the near future.

Accepted Answer

A) True 
 B)False

Question 11

The carrying capacity of the environment for a species is determined by

Accepted Answer

A)   the reproductive rate of the organism.
B)   the number of organisms of that species.
C)   the state and national wildlife laws pertaining to that species.
D)   the age distribution of that species.
E)   the limited availability of renewable resources in the environment and the environmental resistance to the biotic potential of the organism.F) All of the above
G) B) and C)

Question 12

Bangladesh has 2596 persons per square mile, while the United States has 780 persons per square mile and Canada has 9 persons per square mile. These statistics compare the _____ of these countries.

Accepted Answer

A)   population densities
B)   population distributions
C)   carrying capacities
D)   rate of natural increase
E)   limiting factorsF) A) and E)
G) B) and C)

Question 13

Tell what type of growth model is depicted in the graph and describe the factors that must be met for a population to experience this type of growth. Identify the labeled phases, "A" and "B," and briefly explain what occurs during these phases.

Accepted Answer

Answers may vary. This is an exponential...

Question 14

Which of these diagrams represents an age structure diagram of more-developed countries?

Accepted Answer

A)   Diagram A
B)   Diagram B Diagram B is an age structure diagram of less-developed countries, not of more-developed countries.C) A) and B)
D) undefined

Question 15

The sequence of decreased death rate followed by a decrease in birthrate is called

Accepted Answer

A)   environmental resistance.
B)   a limiting factor.
C)   doubling time coefficient.
D)   demographic transition.
E)   replacement reproduction.F) D) and E)
G) B) and C)

Question 16

Calculate the growth rate of a population if the number of births is 100 per year and the number of deaths is 25 per year per 1,000 individuals.

Accepted Answer

(100 - 25)/1,000 = 7...

Question 17

Tell what type of growth model is depicted in the graph and describe the factors that must be met for a population to experience this type of growth. Identify the labeled phases A, B, C, and D and briefly explain what occurs during these phases.

Accepted Answer

This is a logistic growth curve. This ty...

Question 18

Consider the life of the praying mantis. The large predatory female lays several hundred eggs in a foam mass in the fall. The young are most vulnerable when they emerge in the spring, but the few that survive spread out over the countryside and, if they find a mate, lay eggs the following fall. Which type of survivorship curve does this represent?

Accepted Answer

A)   type I
B)   type II
C)   type III
D)   exponential growth followed by a decline from resource depletion
E)   maximal exponential growth and minimal use of carrying capacityF) A) and B)
G) A) and C)

Question 19

An ecologist may study

Accepted Answer

A)   the human impact on the Earth's environment.
B)   the different types of organisms living near a hydrothermal vent and how they interact.
C)   the affect of a particular pesticide on a food chain.
D)   how populations are restricted by environmental resistance.
E)   All of the choices are correct.F) All of the above
G) B) and E)

Question 20

A(n)  _______ consists of all the populations of multiple species interacting in a designated region.

Accepted Answer

A)   ecosystem
B)   community
C)   biosphere
D)   None of the choices are correct.E) A) and B)
F) A) and C)

Exam 44: Population Ecology

How is environmental impact measured in a population?

Correct Answer
verified

What is the expected pattern of growth for a population that has a birthrate that is higher than the death rate?

Correct Answer
verified

When discussing population features a cohort is described as

Correct Answer
verified

An ecologist may study

Correct Answer
verified

Correct Answer
verified

In the logistic growth curve formula, when N is very large, (K-N) /N is almost equal to 0, which results in

Correct Answer
verified

Tell what type of growth model is depicted in the graph and describe the factors that must be met for a population to experience this type of growth. Identify the labeled phases A, B, C, and D and briefly explain what occurs during these phases.

Correct Answer
verified
This is a logistic growth curve. This ty...
View Answer

Bangladesh has 2596 persons per square mile, while the United States has 780 persons per square mile and Canada has 9 persons per square mile. These statistics compare the _____ of these countries.

Correct Answer
verified

A population in which death rates are higher than birth rates, and the prereproductive group is smaller than the reproductive group, is best represented by an age structure diagram with a(n) ______ -shape.

Correct Answer
verified

Tell what type of growth model is depicted in the graph and describe the factors that must be met for a population to experience this type of growth. Identify the labeled phases, "A" and "B," and briefly explain what occurs during these phases.

Correct Answer
verified
Answers may vary. This is an exponential...
View Answer

Which of these diagrams represents an age structure diagram of more-developed countries?

Correct Answer
verified

A type II survivorship curve, drawn by plotting the number of individuals in a given population alive at the beginning of each age interval, is characterized by

Correct Answer
verified

The carrying capacity of the environment for a species is determined by

Correct Answer
verified

Calculate the growth rate of a population if the number of births is 100 per year and the number of deaths is 25 per year per 1,000 individuals.

Correct Answer
verified
(100 - 25)/1,000 = 7...
View Answer

A(n) _______ consists of all the populations of multiple species interacting in a designated region.

Correct Answer
verified

The sequence of decreased death rate followed by a decrease in birthrate is called

Correct Answer
verified

Which of the following studies would lie outside of an ecologists skill set?

Correct Answer
verified

The basic level of an ecological study always begins by looking at how populations interact with each other.

Correct Answer
verified

Only the LDC's will be experiencing overpopulation growth in the near future.

Correct Answer
verified

Consider that a species of salmon lays 20,000 eggs per pair when it spawns and dies. At the end of five years, an average of one pair of mature salmon from this group of hatched eggs returns again to spawn in the parent stream (19,998 have not survived) . What is the growth rate of this population?

Correct Answer
verified

Exam 44: Population Ecology

How is environmental impact measured in a population?

Correct AnswerverifiedShow Answer

What is the expected pattern of growth for a population that has a birthrate that is higher than the death rate?

Correct AnswerverifiedShow Answer

When discussing population features a cohort is described as

Correct AnswerverifiedShow Answer

An ecologist may study

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In the logistic growth curve formula, when N is very large, (K-N) /N is almost equal to 0, which results in

Correct AnswerverifiedShow Answer

Tell what type of growth model is depicted in the graph and describe the factors that must be met for a population to experience this type of growth. Identify the labeled phases A, B, C, and D and briefly explain what occurs during these phases.

Correct AnswerverifiedThis is a logistic growth curve. This ty...View AnswerShow Answer

Bangladesh has 2596 persons per square mile, while the United States has 780 persons per square mile and Canada has 9 persons per square mile. These statistics compare the _____ of these countries.

Correct AnswerverifiedShow Answer

A population in which death rates are higher than birth rates, and the prereproductive group is smaller than the reproductive group, is best represented by an age structure diagram with a(n) ______ -shape.

Correct AnswerverifiedShow Answer

Tell what type of growth model is depicted in the graph and describe the factors that must be met for a population to experience this type of growth. Identify the labeled phases, "A" and "B," and briefly explain what occurs during these phases.

Correct AnswerverifiedAnswers may vary. This is an exponential...View AnswerShow Answer

Which of these diagrams represents an age structure diagram of more-developed countries?

Correct AnswerverifiedShow Answer

A type II survivorship curve, drawn by plotting the number of individuals in a given population alive at the beginning of each age interval, is characterized by

Correct AnswerverifiedShow Answer

The carrying capacity of the environment for a species is determined by

Correct AnswerverifiedShow Answer

Calculate the growth rate of a population if the number of births is 100 per year and the number of deaths is 25 per year per 1,000 individuals.

Correct Answerverified(100 - 25)/1,000 = 7...View AnswerShow Answer

A(n) _______ consists of all the populations of multiple species interacting in a designated region.

Correct AnswerverifiedShow Answer

The sequence of decreased death rate followed by a decrease in birthrate is called

Correct AnswerverifiedShow Answer

Which of the following studies would lie outside of an ecologists skill set?

Correct AnswerverifiedShow Answer

The basic level of an ecological study always begins by looking at how populations interact with each other.

Correct AnswerverifiedShow Answer

Only the LDC's will be experiencing overpopulation growth in the near future.

Correct AnswerverifiedShow Answer

Consider that a species of salmon lays 20,000 eggs per pair when it spawns and dies. At the end of five years, an average of one pair of mature salmon from this group of hatched eggs returns again to spawn in the parent stream (19,998 have not survived) . What is the growth rate of this population?

Correct AnswerverifiedShow Answer

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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified
This is a logistic growth curve. This ty...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Answers may vary. This is an exponential...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
(100 - 25)/1,000 = 7...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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