Which of the following is NOT one of the factors that play a role in population growth rate?

1
Which of the following is NOT one of the factors
that play a role in population growth rate?

1. immigration
2. death rate
3. emigration
4. demography

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2
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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3
Sea otters are important to the populations of

1. kelp.
2. sea urchins.
3. killer whales.
4. all of the above

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4
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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5
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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6
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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7
Which of the following tells you population
density?

1. the number of births per year
2. the number of frogs in a pond
3. the number of deaths per year
4. the number of bacteria per square millimeter

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8
The movement of organisms into a given area from
another area is called

1. immigration.
2. emigration.
3. population shift.
4. carrying capacity.

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9
When organisms move out of the population, this
is known as

1. emigration.
2. abandonment.
3. immigration.
4. succession.

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10
What must occur in a population for it to grow?

1. The birthrate becomes higher than the death rate.
2. The birthrate stays the same and the death rate
   increases.
3. The birthrate becomes lower than the death rate.
4. The birthrate and the death rate remain the same.

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11
What is happening in a population as it decreases?

1. The birthrate and the death rate remain the same.
2. The death rate becomes lower than the birthrate.
3. The death rate stays the same and the birthrate
   increases.
4. The death rate becomes higher than the birthrate.

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12
If immigration and emigration numbers remain
equal, which is the most important contributing
factor to a slowed growth rate?

1. increased birthrate
2. constant death rate
3. decreased birthrate
4. constant birthrate

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13
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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14
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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15
The various growth phases through which most
populations go are represented on a(an)

1. logistic growth curve.
2. exponential growth curve.
3. normal curve.
4. population curve.

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16
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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17
Which factor might NOT contribute to an
exponential growth rate in a given population?

1. lower death rates
2. higher birthrates
3. less competition
4. reduced resources

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18
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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19
When the exponential phase of a logistic growth
curve of a population ceases,

1. the size of the population drops.
2. the size of the population stays the same.
3. population growth begins to slow down.
4. population growth begins to speed up.

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20
A biotic or an abiotic resource in the
environment that causes population size to
decrease is a

1. carrying capacity.
2. limiting nutrient.
3. limiting factor.
4. growth factor.

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21
All of the following are limiting factors EXCEPT

1. immigration.
2. competition.
3. predation.
4. human disturbances.

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22
Which of the following is NOT likely to be a
limiting factor on the sea otter population?

1. disease
2. competition
3. drought
4. predation

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23
Which will reduce competition within a species
population?

1. fewer individuals
2. higher birthrate
3. fewer resources
4. higher population density

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24
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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25
Water lilies do not grow in desert sand because
water availability to these plants in a desert is

1. a limiting factor.
2. the carrying capacity.
3. a competition factor.
4. none of the above

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26
A limiting nutrient is to ecosystem productivity
as a limiting factor is to population

1. birthrate.
2. density.
3. growth rate.
4. immigration.

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27
Each of the following is a density-dependent
limiting factor EXCEPT

1. competition.
2. seasonal cycles.
3. crowding.
4. disease.

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28
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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29
Which of the following is a density-independent
limiting factor?

1. earthquake
2. disease
3. emigration
4. parasitism

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30
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
2. parasitic wasps for the wolves and clear-cut
   forest for the moose
3. a hurricane followed by drought for both moose
   and wolves
4. food availability for the moose and disease for
   the wolf

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31
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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32
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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33
Human population growth has slowed down in

1. China.
2. the United States.
3. India.
4. Africa.

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34
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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35
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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36
About 500 years ago, the worlds population
started

1. decreasing.
2. to reach carrying capacity.
3. growing more rapidly.
4. to level off.

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37
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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38
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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39
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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40
Which country has not yet completed the
demographic transition?

1. United States
2. India
3. Great Britain
4. Japan

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41
The anticipated human population by the year 2050
is about

1. 7.8 billion.
2. 9 billion.
3. 9 trillion.
4. 78 billion.

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42
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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43
In countries like India, the human population is
growing

1. exponentially.
2. transitionally.
3. logistically.
4. demographically.

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44
Most of the worldwide human population is growing
exponentially because

1. human populations have not reached their
   exponential curve.
2. human populations have not yet completed the
   demographic transition.
3. human populations do not conform to the logistic
   model.
4. science and technology have made it possible.

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45
How can a diagram of a populations age structure
predict how it can grow?

1. It shows how many people are at reproductive
   ages.
2. It shows how many people will probably die within
   a few years.
3. It shows how many people are entering the
   population by birth.
4. all of the above

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46
The number of individuals per unit area is a
populations growth rate. ________________________
_

1. True
2. False

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47
If the death rate of a population is greater than
the birthrate, the population shrinks.
_________________________

1. True
2. False

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48
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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49
Logistic growth occurs when a populations growth
slows or stops, following a period of rapid
growth. _________________________

1. True
2. False

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50
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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51
The exponential model of population growth
accounts for the influence of carrying capacity.
_________________________

1. True
2. False

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52
One of the best-known mechanisms of population
control is the parasite-host relationship.
_________________________

1. True
2. False

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53
Predators can limit the size of populations by
weakening their hosts, resulting in disease or
death. _________________________

1. True
2. False

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54
Human activities, such as damming rivers, are
density-independent limiting factors.
_________________________

1. True
2. False

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55
Density-dependent limiting factors affect all
populations, whether the population size is two
or a hundred. _________________________

1. True
2. False

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56
Resource shortages triggered by increasing
population size are density-independent limiting
factors. _________________________

1. True
2. False

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57
The size of the human population tends to
increase with time. _________________________

1. True
2. False

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58
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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59
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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60
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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61
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62
A population can be characterized by its
geographic distribution, density, growth rate,
and _________________________.
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63
Emigration can cause a population to
____________________ in size.
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64
When an individual moves into one population from
a different population, it is called
____________________.
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65
Under ideal conditions with unlimited resources,
a population will grow ____________________.
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66
Zero population growth is a characteristic of
____________________ population growth.
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67
A population of bacteria with a limited supply of
nutrients will eventually show growth typical of
the ____________________ model.
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68
If an entire wolf population dies, the moose
population on which it preys will grow to the
environments ____________________.
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69
Competition, predation, parasitism, and
____________________ are density-dependent
limiting factors.
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70
Density-dependent ____________________ factors in
natural populations help keep them from
increasing indefinitely.
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71
The rise-and-fall cycle of a predator-prey
relationship is a density-____________________
relationship.
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72
A diagram that illustrates how many people of
different ages and gender are presently living in
a country is called a(an) ________________________
______.
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73
The change in growth rate that results from the
change in birthrates and death rates is known as
a ______________________________.
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74
During early human history, the growth rate was
low because the birthrate was high and the death
rate was ____________________.
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75
Social and ____________________ factors explain
why some countries have high growth rates,
whereas other countries grow slowly or not at all.
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76
The exponential growth rate of some countries
indicates that these countries have not yet fully
____________________ socially and economically.
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77
What are four main characteristics of a
population?
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78
How does emigration affect population size?
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79
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?
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80
Why must wildlife biologists consider immigration
and emigration when studying certain animals?
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81
Describe the graph of exponential growth.
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82
Describe the period of growth on a logistic
growth curve just before carrying capacity is
reached.
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83
What is a limiting factor? Give two or three
examples
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84
What is a density-independent limiting factor?
Give two or three examples
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85
What are some factors that keep a population from
growing further once it reaches the carrying
capacity of its environment?
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86
Why did the human population begin growing
exponentially about 500 years ago?
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87
What kept the human growth rate low before the
Industrial Revolution?
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88
How can a demographer, or scientist who studies
demography, predict how a population will change
in the future?
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89
What are some of the factors that economists
believe will overcome the negative impacts of the
growth of the human population?
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90
How does population growth in the United States
compare with that in China and India?
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91
What evidence is there that Japan has completed
the demographic transition?
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92
How can different population sizes affect density
in areas of the same size? Give an example
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93
Discuss four ways population sizes can change.
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94
Differentiate between exponential and logistic
growth.
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95
Explain the limiting factors that control
population growth.
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96
Explain how predator and prey populations limit
each others growth rates.
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97
Differentiate between density-dependent and
density-independent limiting factors.
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98
Competition can be a major force behind
evolutionary change. How does this competition
relate to density-dependent competition?
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99
Sequence the historical events that contributed
to the current human population growth.
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100
Compare some ecologists view of world population
growth with that of some economists.
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101
What is the future of worldwide population growth?
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