Question 1

A human population with a large percentage of pre-reproductive individuals is common in

Accepted Answer

A)  less-developed countries and will most likely increase in size.
B)  more-developed countries and will most likely increase in size.
C)  less-developed countries and will most likely decrease in size.
D)  more-developed countries and will most likely decrease in size.E) A) and B)
F) All of the above

Question 2

All of the organisms in a given location or area are termed a

Accepted Answer

A)  peer group.
B)  flock.
C)  community.
D)  population.
E)  herd.F) B) and D)
G) C) and E)

Question 3

The United Nations has estimated (for the high estimate)that the world's human population may reach about 10.5 billion by the year 2050 and will continue to increase.

Accepted Answer

A) True 
 B)False

Question 4

The number of new individuals produced per unit time in a population is its

Accepted Answer

A)  immigration rate.
B)  emigration rate.
C)  death rate.
D)  birth rate.
E)  expatriation ratE.F) B) and D)
G) C) and D)

Question 5

Which of the following is an example of an aquatic community?

Accepted Answer

A)  fishes,snails,crabs,water,and salinity
B)  fishes,snails,and crabs only
C)  both water and salinity
D)  water only
E)  salinity onlyF) All of the above
G) B) and E) B

Question 6

In a survivorship curve,a type II species,like a song bird,is a species that has

Accepted Answer

A)  an equal probability of dying at any age.
B)  a strong possibility of becoming extinct in a relatively short period of time.
C)  the highest probability of dying as it reaches its maximum life span.
D)  an extremely short life span.
E)  the highest probability of dying at a very young agE.F) C) and E)
G) A) and B)

Question 7

Which of the following organisms is an example of an opportunistic species?

Accepted Answer

A)  dolphins
B)  humans
C)  rabbits
D)  penguins
E)  tortoisesF) A) and D)
G) None of the above

Question 8

A group of organisms of one species occupying a geographical location at the same time is a

Accepted Answer

A)  population.
B)  community.
C)  peer group.
D)  flock.
E)  herd.F) None of the above
G) A) and B)

Question 9

Predation of deer by wolves is an example of a

Accepted Answer

A)  density-independent limit.
B)  density-codependent limit.
C)  density-dependent limit.
D)  death-dependent factor.
E)  death-independent factor.F) C) and E)
G) C) and D)

Question 10

Oysters and many other mollusks produce many offspring of which only a few survive to adulthood and then have little risk of predation with their strong adult shells.Oysters are an example of an organism with a type ______ survivorship curve.

Accepted Answer

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

Question 11

In a survivorship curve,a type I species,like a human or elephant,is a species that has

Accepted Answer

A)  an equal probability of dying at any age.
B)  the highest probability of dying as it reaches its maximum life span.
C)  a strong possibility of becoming extinct in a relatively short period of time.
D)  an extremely short life span.
E)  the highest probability of dying at a very young agE.F) All of the above
G) B) and D)

Question 12

Researchers studying guppies in Trinidad found that guppies in streams with high predation reproduced earlier and more frequently.Which of the following is most important in driving the guppies to change their life history in face of predation?

Accepted Answer

A)  The guppies are an equilibrium species.
B)  The guppies are an opportunistic species.
C)  Density-independent factors affects the guppy populations.
D)  Density-dependent factors affects the guppy populations.
E)  Sexual selection affects the guppy populations.F) A) and D)
G) All of the above

Question 13

A population age structure diagram depicting an equal number of individuals in each age group suggests that the population is

Accepted Answer

A)  stable.
B)  growing.
C)  declining.
D)  facing extinction.
E)  very small.F) None of the above
G) B) and D)

Question 14

The number of individuals that die in a population per unit time is its

Accepted Answer

A)  immigration rate.
B)  emigration rate.
C)  death rate.
D)  birth rate.
E)  expatriation ratE.F) A) and C)
G) A) and E)

Question 15

The physical location where an organism lives is termed its

Accepted Answer

A)  home boundary.
B)  range.
C)  habitat.
D)  community.
E)  ecosystem.F) All of the above
G) A) and E) C

Question 16

Why have human growth rates increased the most in developing countries in the past 50 years?

Accepted Answer

A)  Death rates have fallen more slowly than birth rates.
B)  Death rates have gone up faster than birth rates.
C)  Death rates have fallen faster than birth rates.
D)  Death rates have gone up more slowly than birth rates.E) None of the above
F) All of the above

Question 17

The number of individuals of a species per unit area or volume of habitat is

Accepted Answer

A)  carrying capacity.
B)  population density.
C)  a community.
D)  population distribution.
E)  population dynamics.F) B) and E)
G) B) and D)

Question 18

Which falls outside the study of ecology?

Accepted Answer

A)  spread of disease
B)  predator-prey relationships
C)  invasive plant species
D)  bonds of DNA
E)  land managementF) A) and B)
G) All of the above

Question 19

Governments of France,Canada,and China offer financial incentives to encourage citizens to have children.

Accepted Answer

A) True 
 B)False  False

Question 20

Conditions whose growth-limiting effects increase as a population grows are density-independent factors.

Accepted Answer

A) True 
 B)False

Exam 18: Populations

A human population with a large percentage of pre-reproductive individuals is common in

Correct AnswerverifiedShow Answer

All of the organisms in a given location or area are termed a

Correct AnswerverifiedShow Answer

The United Nations has estimated (for the high estimate)that the world's human population may reach about 10.5 billion by the year 2050 and will continue to increase.

Correct AnswerverifiedShow Answer

The number of new individuals produced per unit time in a population is its

Correct AnswerverifiedShow Answer

Which of the following is an example of an aquatic community?

Correct AnswerverifiedB

In a survivorship curve,a type II species,like a song bird,is a species that has

Correct AnswerverifiedShow Answer

Which of the following organisms is an example of an opportunistic species?

Correct AnswerverifiedShow Answer

A group of organisms of one species occupying a geographical location at the same time is a

Correct AnswerverifiedShow Answer

Predation of deer by wolves is an example of a

Correct AnswerverifiedShow Answer

Oysters and many other mollusks produce many offspring of which only a few survive to adulthood and then have little risk of predation with their strong adult shells.Oysters are an example of an organism with a type ______ survivorship curve.

Correct AnswerverifiedShow Answer

In a survivorship curve,a type I species,like a human or elephant,is a species that has

Correct AnswerverifiedShow Answer

Researchers studying guppies in Trinidad found that guppies in streams with high predation reproduced earlier and more frequently.Which of the following is most important in driving the guppies to change their life history in face of predation?

Correct AnswerverifiedShow Answer

A population age structure diagram depicting an equal number of individuals in each age group suggests that the population is

Correct AnswerverifiedShow Answer

The number of individuals that die in a population per unit time is its

Correct AnswerverifiedShow Answer

The physical location where an organism lives is termed its

Correct AnswerverifiedC

Why have human growth rates increased the most in developing countries in the past 50 years?

Correct AnswerverifiedShow Answer

The number of individuals of a species per unit area or volume of habitat is

Correct AnswerverifiedShow Answer

Which falls outside the study of ecology?

Correct AnswerverifiedShow Answer

Governments of France,Canada,and China offer financial incentives to encourage citizens to have children.

Correct AnswerverifiedFalse

Conditions whose growth-limiting effects increase as a population grows are density-independent factors.

Correct AnswerverifiedShow Answer

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B

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C

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False

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