Transcript Which of the following is NOT one of the factors that play a role in

Which of the following is NOT one of the
factors that play a role in population growth
rate?
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1. immigration
2. death rate
3. emigration
4. demography
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One of the main characteristics
of a population is its
1. change over time.
2. geographic
distribution.
3. dynamics.
4. habitat.
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Sea otters are important to the
populations of
1.
2.
3.
4.
1
kelp.
sea urchins.
killer whales.
all of the above
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There are 150 Saguaro cactus plants per square kilometer
in a certain area of Arizona desert. To which population
characteristic does this information refer?
1. growth rate
2. geographic
distribution
3. age structure
4. population density
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What does the range of a population
tell you that density does not?
1. the number that live
in an area
2. the areas inhabited
by a population
3. the births per unit
area
4. the deaths per unit
area
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A small farming community in Texas covers 14 square
kilometers. There are 420 individuals who live within the
town limits. What is the population density of this
community?
1. 0.03 individuals per
square kilometer
2. 53 individuals per
square kilometer
3. 30 individuals per
square kilometer
4. 10.24 individuals per
square kilometer
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Which of the following tells you
population density?
1.
the number of births per
year
the number of frogs in a
pond
the number of deaths
per year
the number of bacteria
per square millimeter
2.
3.
4.
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The movement of organisms into a
given area from another area is called
1.
2.
3.
4.
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immigration.
emigration.
population shift.
carrying capacity.
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When organisms move out of
the population, this is known as
1.
2.
3.
4.
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emigration.
abandonment.
immigration.
succession.
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What must occur in a population
for it to grow?
1.
The birthrate becomes higher
than the death rate.
The birthrate stays the same
and the death rate increases.
The birthrate becomes lower
than the death rate.
The birthrate and the death
rate remain the same.
2.
3.
4.
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What is happening in a
population as it decreases?
1.
The birthrate and the death rate
remain the same.
The death rate becomes lower than
the birthrate.
The death rate stays the same and
the birthrate increases.
The death rate becomes higher than
the birthrate.
2.
3.
4.
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If immigration and emigration numbers
remain equal, which is the most important
contributing factor to a slowed growth rate?
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1. increased
birthrate
2. constant death
rate
3. decreased
birthrate
4. constant birthrate
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Which are two ways a population
can decrease in size?
1. immigration and
emigration
2. increased death rate
and immigration
3. decreased birthrate
and emigration
4. emigration and
increased birthrate
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When individuals in a population
reproduce at a constant rate, it is called
1. logistic growth.
2. growth density.
3. exponential
growth.
4. multiple growth.
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The various growth phases through which
most populations go are represented on
a(an)
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1. logistic growth
curve.
2. exponential
growth curve.
3. normal curve.
4. population curve.
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As resources in a population become
less available, the population
1. declines rapidly.
2. increases slowly.
3. reaches carrying
capacity.
4. enters a phase of
exponential
growth.
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Which factor might NOT contribute to an
exponential growth rate in a given
population?
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1. lower death rates
2. higher birthrates
3. less competition
4. reduced
resources
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In a logistic growth curve, exponential
growth is the phase in which the population
1. reaches carrying
capacity.
2. grows quickly.
3. growth begins to
slow down.
4. growth stops.
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When the exponential phase of a logistic
growth curve of a population ceases,
1.
the size of the
population drops.
the size of the
population stays the
same.
population growth
begins to slow down.
population growth
begins to speed up.
2.
3.
4.
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A biotic or an abiotic resource in the
environment that causes population size to
decrease is a
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1. carrying capacity.
2. limiting nutrient.
3. limiting factor.
4. growth factor.
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All of the following are limiting
factors EXCEPT
1.
2.
3.
4.
1
immigration.
competition.
predation.
human
disturbances.
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Which of the following is NOT likely to be a
limiting factor on the sea otter population?
1.
2.
3.
4.
1
disease
competition
drought
predation
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3
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Which will reduce competition
within a species’ population?
1.
2.
3.
4.
1
fewer individuals
higher birthrate
fewer resources
higher population
density
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If a population grows larger than the carrying
capacity of the environment, the
1. death rate may
rise.
2. birthrate may rise.
3. death rate must
fall.
4. birthrate must fall.
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Water lilies do not grow in desert sand
because water availability to these plants in
a desert is
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1. a limiting factor.
2. the carrying
capacity.
3. a competition
factor.
4. none of the above
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A limiting nutrient is to ecosystem
productivity as a limiting factor is to
population
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birthrate.
density.
growth rate.
immigration.
1.
2.
3.
4.
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Each of the following is a densitydependent limiting factor EXCEPT
1.
2.
3.
4.
1
competition.
seasonal cycles.
crowding.
disease.
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Which would be least likely to be affected by
a density-dependent limiting factor?
1. a small, scattered population
2. a population with a high
birthrate
3. a large, dense population
4. a population with a high
immigration rate
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Which of the following is a densityindependent limiting factor?
1.
2.
3.
4.
1
earthquake
disease
emigration
parasitism
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Which density-dependent factors other than the
predator/prey relationship affected the populations
of moose and wolves on Isle Royale?
1.
extreme temperatures for the moose
and flooding for the wolves
parasitic wasps for the wolves and
clear-cut forest for the moose
a hurricane followed by drought for
both moose and wolves
food availability for the moose and
disease for the wolf
2.
3.
4.
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A disease resulting in the deaths of one third
of a dense population of bats in a cave
would be a
1. density-dependent
limiting factor.
2. result of exponential
growth.
3. density-independent
limiting factor.
4. nutrient-limiting
factor.
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Which of the following would NOT be a
limiting factor to the size of a large, dense
population?
1. a struggle for food, water,
space, or sunlight
2. predator/prey relationships
3. a struggle to find shelter from
a natural disaster
4. parasitism and disease
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Human population growth has
slowed down in
1.
2.
3.
4.
1
China.
the United States.
India.
Africa.
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Demography is the scientific
study of
1. parasitism and
disease.
2. modernized
countries.
3. human
populations.
4. none of the above
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Demographic transition is change from
high birthrates and high death rates to
1. exponential growth.
2. a low birthrate and a
low death rate.
3. a low birthrate and a
high death rate.
4. indefinite growth.
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About 500 years ago, the
world’s population started
1. decreasing.
2. to reach carrying
capacity.
3. growing more
rapidly.
4. to level off.
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Countries in the first stage of
demographic transition have
1. a low death rate and
a high birthrate.
2. a high death rate
and a low birthrate.
3. a slowly growing
population.
4. more old people
than young people.
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Demographic transition begins
with changes in society that
1. lower the birthrate.
2. increase the
birthrate.
3. lower the death rate.
4. increase the death
rate.
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The human population experienced
exponential growth after
1. agriculture began.
2. plowing and
irrigation began.
3. the bubonic
plague began.
4. the Industrial
Revolution began.
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Which country has not yet completed
the demographic transition?
1.
2.
3.
4.
1
United States
India
Great Britain
Japan
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The anticipated human population
by the year 2050 is about
1.
2.
3.
4.
1
7.8 billion.
9 billion.
9 trillion.
78 billion.
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In Rwanda, there are more young children than
teenagers, and more teenagers than adults. This
age structure indicates a population that
1. has stopped
growing.
2. will double in 30
years.
3. has a steady growth
rate.
4. will decrease in 30
years.
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In countries like India, the
human population is growing
1.
2.
3.
4.
1
exponentially.
transitionally.
logistically.
demographically.
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Most of the worldwide human population is
growing exponentially because
1.
human populations have not
reached their exponential curve.
human populations have not yet
completed the demographic
transition.
human populations do not conform
to the logistic model.
science and technology have made
it possible.
2.
3.
4.
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4
How can a diagram of a population’s
age structure predict how it can grow?
1.
It shows how many people
are at reproductive ages.
It shows how many people
will probably die within a few
years.
It shows how many people
are entering the population by
birth.
all of the above
2.
3.
4.
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The number of individuals per unit area is a
population’s growth rate.
_________________________
1. True
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50%
2. False
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2
If the death rate of a population is greater
than the birthrate, the population shrinks.
_________________________
1. True
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50%
2. False
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3
4
5
1
2
There are about four million births per year in the United
States. This statistic is a population dynamic called growth
rate. _________________________
1. True
2. False
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2
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4
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1
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2
Logistic growth occurs when a population’s growth
slows or stops, following a period of rapid growth.
_________________________
1. True
2. False
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2
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4
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50%
2
Under conditions of logistic growth, population size
will rise and fall around an average point called the
carrying capacity. _________________________
1. True
2. False
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4
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The exponential model of population growth
accounts for the influence of carrying
capacity. _________________________
1. True
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50%
2. False
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3
4
5
1
2
One of the best-known mechanisms of
population control is the parasite-host
relationship. _________________________
1. True
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50%
2. False
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3
4
5
1
2
Predators can limit the size of populations by
weakening their hosts, resulting in disease or
death. _________________________
1. True
2. False
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2
3
4
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5
1
50%
2
Human activities, such as damming rivers,
are density-independent limiting factors.
_________________________
1. True
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50%
2. False
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2
3
4
5
1
2
Density-dependent limiting factors affect all
populations, whether the population size is two or
a hundred. _________________________
1. True
2. False
1
2
3
4
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5
1
50%
2
Resource shortages triggered by increasing
population size are density-independent limiting
factors. _________________________
1. True
2. False
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2
3
4
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5
1
50%
2
The size of the human population tends to
increase with time.
_________________________
1. True
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50%
2. False
1
2
3
4
5
1
2
The human population grew slowly from the beginning of
human existence, and then began to grow exponentially
about 200 years ago. _________________________
1. True
2. False
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2
3
4
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5
1
50%
2
The population of a country whose age structure has many
more children than people over 40 years of age will
probably decrease rapidly in the future.
_________________________
1. True
2. False
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2
3
4
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5
1
50%
2
An indication that a country has completed the
demographic transition is a low birthrate and a low
death rate. _________________________
1. True
2. False
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2
3
4
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5
1
50%
2
Participant Scores
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Participant 1
Participant 2
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Participant 4
Participant 5
A population can be characterized by its
geographic distribution, density, growth rate,
and _________________________.
1
2
3
4
5
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Emigration can cause a population
to ____________________ in size.
1
2
3
4
5
0 of 5
When an individual moves into one
population from a different population, it is
called ____________________.
1
2
3
4
5
0 of 5
Under ideal conditions with unlimited
resources, a population will grow
____________________.
1
2
3
4
5
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Zero population growth is a characteristic of
____________________ population growth.
1
2
3
4
5
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A population of bacteria with a limited supply of
nutrients will eventually show growth typical of the
____________________ model.
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2
3
4
5
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If an entire wolf population dies, the moose
population on which it preys will grow to the
environment’s ____________________.
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2
3
4
5
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Competition, predation, parasitism, and
____________________ are densitydependent limiting factors.
1
2
3
4
5
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Density-dependent ____________________
factors in natural populations help keep
them from increasing indefinitely.
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3
4
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The rise-and-fall cycle of a predator-prey
relationship is a density____________________ relationship.
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2
3
4
5
0 of 5
A diagram that illustrates how many people of different
ages and gender are presently living in a country is called
a(an) ______________________________.
1
2
3
4
5
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The change in growth rate that results from the
change in birthrates and death rates is known as a
______________________________.
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2
3
4
5
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During early human history, the growth rate was
low because the birthrate was high and the death
rate was ____________________.
1
2
3
4
5
0 of 5
Social and ____________________ factors explain why
some countries have high growth rates, whereas other
countries grow slowly or not at all.
1
2
3
4
5
0 of 5
The exponential growth rate of some countries indicates
that these countries have not yet fully
____________________ socially and economically.
1
2
3
4
5
0 of 5
What are four main
characteristics of a population?
1
2
3
4
5
0 of 5
How does emigration affect
population size?
1
2
3
4
5
0 of 5
If a population of pine trees is 25 trees in 5 square
kilometers and another population is 25 trees in 2 square
kilometers, which population has the higher density? Why?
1
2
3
4
5
0 of 5
Why must wildlife biologists consider
immigration and emigration when studying
certain animals?
1
2
3
4
5
0 of 5
Describe the graph of
exponential growth.
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2
3
4
5
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Describe the period of growth on a logistic
growth curve just before carrying capacity is
reached.
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2
3
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5
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What is a limiting factor? Give
two or three examples
1
2
3
4
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What is a density-independent limiting
factor? Give two or three examples
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2
3
4
5
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What are some factors that keep a population from
growing further once it reaches the carrying
capacity of its environment?
1
2
3
4
5
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Why did the human population begin
growing exponentially about 500 years ago?
1
2
3
4
5
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What kept the human growth rate low
before the Industrial Revolution?
1
2
3
4
5
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How can a demographer, or scientist who
studies demography, predict how a
population will change in the future?
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2
3
4
5
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What are some of the factors that economists
believe will overcome the negative impacts of the
growth of the human population?
1
2
3
4
5
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How does population growth in the United
States compare with that in China and
India?
1
2
3
4
5
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What evidence is there that Japan has
completed the demographic transition?
1
2
3
4
5
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How can different population sizes affect
density in areas of the same size? Give an
example
1
2
3
4
5
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Discuss four ways population
sizes can change.
1
2
3
4
5
0 of 5
Differentiate between
exponential and logistic growth.
1
2
3
4
5
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Explain the limiting factors that
control population growth.
1
2
3
4
5
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Explain how predator and prey populations
limit each other’s growth rates.
1
2
3
4
5
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Differentiate between density-dependent
and density-independent limiting factors.
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2
3
4
5
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Competition can be a major force behind
evolutionary change. How does this competition
relate to density-dependent competition?
1
2
3
4
5
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Sequence the historical events that
contributed to the current human population
growth.
1
2
3
4
5
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Compare some ecologists’ view of world
population growth with that of some
economists.
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3
4
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What is the future of worldwide
population growth?
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