Question 1

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) A) and B)
F) A) and C)

Question 2

Which of the following best describes the link between survivorship curves and opportunistic species?

Accepted Answer

A)  Opportunistic species are limited by density-dependent factors and have few offspring.
B)  Opportunistic species are limited by density-independent factors and have few offspring.
C)  Opportunistic species are limited by density-independent factors and have many offspring.
D)  Opportunistic species are limited by density-dependent factors and have many offspring.E) A) and C)
F) A) and B)

Question 3

In the section "Investigating Life: Let Your Love Light Shine",a male places a protein-rich packet of sperm called a spermatophore into the female's reproductive tract during mating.The spermatophore fertilizes the female and provides food for the eggs.Which of the following is a selective advantage for females?

Accepted Answer

A)  choosing a male who produces a lot of sperm
B)  choosing a larger male
C)  mating with multiple males
D)  choosing a male with a large spermatophore
E)  producing fewer eggsF) C) and D)
G) A) and B)

Question 4

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 B)
G) A) and C)

Question 5

Which of the following are biotic components?

Accepted Answer

A)  trees,birds,insects,rainfall,and sunlight
B)  trees,birds,and insects only
C)  birds and insects only
D)  rainfall and sunlight only
E)  trees onlyF) C) and D)
G) B) and E)

Question 6

When exponential growth is plotted over time a J-shaped curve emerges.

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

The maximum number of individuals that a habitat can support indefinitely is the habitat's

Accepted Answer

A)  density dispersion.
B)  carrying capacity.
C)  growth capacity.
D)  environmental loaD.
E)  dispersion capacity.F) A) and B)
G) A) and D)

Question 9

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) D) and E)
G) C) and E)

Question 10

In the section "Investigating Life: Let Your Love Light Shine",what correlation did the scientists observe in part b of the figure?

Accepted Answer

A)  Females preferred males who flashed for 80 msec.
B)  Females preferred males who flashed for 132 msec.
C)  Females preferred males who flashed for 108 mseC.
D)  Females did not show any preference based on flash duration.E) All of the above
F) B) and C)

Exam 18: Population Ecology

Which of the following are biotic components?

Correct Answer
verified

When exponential growth is plotted over time a J-shaped curve emerges.

Correct Answer
verified

Which of the following best describes the link between survivorship curves and opportunistic species?

Correct Answer
verified

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 Answer
verified

Correct Answer
verified

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 Answer
verified

The maximum number of individuals that a habitat can support indefinitely is the habitat's

Correct Answer
verified

In the section "Investigating Life: Let Your Love Light Shine",what correlation did the scientists observe in part b of the figure?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Exam 18: Population Ecology

Which of the following are biotic components?

Correct AnswerverifiedShow Answer

When exponential growth is plotted over time a J-shaped curve emerges.

Correct AnswerverifiedShow Answer

Which of the following best describes the link between survivorship curves and opportunistic species?

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

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

The maximum number of individuals that a habitat can support indefinitely is the habitat's

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Let Your Love Light Shine",what correlation did the scientists observe in part b of the figure?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified