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Cards In This Set
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1)
The decline of the Nile perch in Lake Victoria
in east Africa and the reemergence of cichlids is an excellent situation for
study by
a.
geologists.
b.
ecologists.
c.
population ecologists.
d.
geographers.
e.
population geneticists.
|
C
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1)
A group of individuals of a single species that
occupy the same general area defines a
a.
population.
b.
community.
c.
species.
d.
subspecies.
e.
clone.
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A
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1)
Which of the following is an example of a
population?
a.
all of the microorganisms on your skin
b.
all of the species of cichlid fish in Lake
Victoria
c.
all of the students in your classroom
d.
all students attending colleges and universities
in your state
e.
the various plants found in prairies in the
western United States
|
C
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1)
The pattern of distribution for a certain
species of kelp is clumped. We would expect that the pattern of distribution
for a population of snails that live on the kelp would be
a.
absolute.
b.
clumped.
c.
homogeneous.
d.
random.
e.
uniform.
|
B
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1)
You drive through Iowa in the spring and notice
that along a stretch of several kilometers, every third fence post has a male
redwing blackbird perched on it defending its nesting territory. This is an
example of
a.
learned dispersion.
b.
clumped dispersion.
c.
random dispersion.
d.
uniform dispersion.
e.
artificial dispersion.
|
D
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1)
A survivorship curve is a
a.
graph that plots an individual's likelihood of
reproducing as a function of age.
b.
graph that plots an individual's likelihood of
being alive as a function of age.
c.
graph that shows the effect of predation on a
prey population.
d.
model for population growth that incorporates
the concept of carrying capacity.
e.
model for population growth that incorporates
reproductive rates.
|
B
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1)
A Type I survivorship curve is the result of
which of the following life history traits?
a.
parents providing extended care for their young
b.
large numbers of offspring being produced
c.
infant mortality being much greater than adult
mortality
d.
death rates remaining constant over the life
span
a short life span for most
individuals
|
A
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|
1)
The maximum number of individuals a habitat can
support is called its
a.
reproductive potential.
b.
carrying capacity.
c.
community size.
d.
density-dependent
factor.
e.
population growth.
|
B
|
|
1)
Consider a stable frog population living at
carrying capacity in a pond. If an average female produces 6,000 eggs during
her lifetime and an average of 300 tadpoles hatch from these eggs, how many of
these tadpoles will, on average, survive to reproduce?
a.
0
b.
2
c.
10 to 20
d.
100
e.
more than 100
|
B
|
|
1)
If a population has a birth rate of 40
individuals per 1,000 per year and a death rate of 30 individuals per 1,000 per
year, how will the population change each year? (Assume that the population is
below carrying capacity and that there is no immigration or emigration.)
a.
It will decrease by 70%.
b.
It will increase by 1%.
c.
It will increase by 5%.
d.
It will increase by 70%.
e.
It will increase by 100%.
|
B
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1)
A tidal wave wipes out the entire population of
mice living on an island. This is an example of
a.
Type III survivorship.
b.
a density-dependent
effect.
c.
the reason that most island forms have evolved
mechanisms for rapid dispersal.
d.
the effects of abiotic factors.
e.
the interaction between density-dependent and abiotic factors.
|
D
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1)
In the logistic growth model, as population size
increases, birth rates
a.
remain constant and death rates increase.
b.
decline but death rates remain steady.
c.
and death rates increase.
d.
and death rates remain steady.
e.
rates decline and/or death rates increase.
|
E
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1)
Which of the following is most clearly a case of
density-dependent population
regulation?
a.
the summer drying of savanna grass for an insect
that feeds on grass sap
b.
a dangerous new flu strain that is transmitted
among humans by sneezing
c.
the first hard frost of fall for a population of
annual morning glory vines
d.
the growth of shade trees over a population of
sun-loving shrubs in an abandoned
field
e.
the occurrence of rainstorms for an
opportunistic desert annual
|
B
|
|
1)
In terms of population dynamics, what is
"boom-and-bust" cycling?
a.
a situation in which the movement of limiting
nutrients through an ecosystem is pulsatile rather than steady
b.
a situation in which a population oscillates
around the carrying capacity of its environment
c.
a situation in which a growing population
overshoots the carrying capacity of its environment and experiences a crash
before stabilizing
d.
a situation in which sex ratios in a population
exhibit reciprocal oscillations
e.
a situation in which the populations of a
predator species and a prey species oscillate in unison
|
B
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|
1)
What is the age structure of a population?
a.
the curve that results when the likelihood of
dying is plotted as a function of age
b.
the curve that results when the likelihood of
being alive is plotted as a function of age
c.
the proportion of individuals in different age
groups
d.
the difference in the age distribution of a
population at two different points in time
the structure of a
population at different points on its growth curve
|
C
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