Title: Which of the following is NOT one of the factors that play a role in population growth rate?
1Which of the following is NOT one of the factors
that play a role in population growth rate?
- immigration
- death rate
- emigration
- demography
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2One of the main characteristics of a population
is its
- change over time.
- geographic distribution.
- dynamics.
- habitat.
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3Sea otters are important to the populations of
- kelp.
- sea urchins.
- killer whales.
- all of the above
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4There are 150 Saguaro cactus plants per square
kilometer in a certain area of Arizona desert. To
which population characteristic does this
information refer?
- growth rate
- geographic distribution
- age structure
- population density
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5What does the range of a population tell you that
density does not?
- the number that live in an area
- the areas inhabited by a population
- the births per unit area
- the deaths per unit area
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6A 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?
- 0.03 individuals per square kilometer
- 53 individuals per square kilometer
- 30 individuals per square kilometer
- 10.24 individuals per square kilometer
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7Which of the following tells you population
density?
- 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
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8The movement of organisms into a given area from
another area is called
- immigration.
- emigration.
- population shift.
- carrying capacity.
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9When organisms move out of the population, this
is known as
- emigration.
- abandonment.
- immigration.
- succession.
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10What must occur in a population for it to grow?
- 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.
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11What is happening in a population as it decreases?
- 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.
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12If immigration and emigration numbers remain
equal, which is the most important contributing
factor to a slowed growth rate?
- increased birthrate
- constant death rate
- decreased birthrate
- constant birthrate
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13Which are two ways a population can decrease in
size?
- immigration and emigration
- increased death rate and immigration
- decreased birthrate and emigration
- emigration and increased birthrate
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14When individuals in a population reproduce at a
constant rate, it is called
- logistic growth.
- growth density.
- exponential growth.
- multiple growth.
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15The various growth phases through which most
populations go are represented on a(an)
- logistic growth curve.
- exponential growth curve.
- normal curve.
- population curve.
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16As resources in a population become less
available, the population
- declines rapidly.
- increases slowly.
- reaches carrying capacity.
- enters a phase of exponential growth.
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17Which factor might NOT contribute to an
exponential growth rate in a given population?
- lower death rates
- higher birthrates
- less competition
- reduced resources
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18In a logistic growth curve, exponential growth is
the phase in which the population
- reaches carrying capacity.
- grows quickly.
- growth begins to slow down.
- growth stops.
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19When the exponential phase of a logistic growth
curve of a population ceases,
- 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.
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20A biotic or an abiotic resource in the
environment that causes population size to
decrease is a
- carrying capacity.
- limiting nutrient.
- limiting factor.
- growth factor.
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21All of the following are limiting factors EXCEPT
- immigration.
- competition.
- predation.
- human disturbances.
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22Which of the following is NOT likely to be a
limiting factor on the sea otter population?
- disease
- competition
- drought
- predation
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23Which will reduce competition within a species
population?
- fewer individuals
- higher birthrate
- fewer resources
- higher population density
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24If a population grows larger than the carrying
capacity of the environment, the
- death rate may rise.
- birthrate may rise.
- death rate must fall.
- birthrate must fall.
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25Water lilies do not grow in desert sand because
water availability to these plants in a desert is
- a limiting factor.
- the carrying capacity.
- a competition factor.
- none of the above
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26A limiting nutrient is to ecosystem productivity
as a limiting factor is to population
- birthrate.
- density.
- growth rate.
- immigration.
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27Each of the following is a density-dependent
limiting factor EXCEPT
- competition.
- seasonal cycles.
- crowding.
- disease.
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28Which would be least likely to be affected by a
density-dependent limiting factor?
- a small, scattered population
- a population with a high birthrate
- a large, dense population
- a population with a high immigration rate
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29Which of the following is a density-independent
limiting factor?
- earthquake
- disease
- emigration
- parasitism
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30Which density-dependent factors other than the
predator/prey relationship affected the
populations of moose and wolves on Isle Royale?
- 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
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31A disease resulting in the deaths of one third of
a dense population of bats in a cave would be a
- density-dependent limiting factor.
- result of exponential growth.
- density-independent limiting factor.
- nutrient-limiting factor.
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32Which of the following would NOT be a limiting
factor to the size of a large, dense population?
- a struggle for food, water, space, or sunlight
- predator/prey relationships
- a struggle to find shelter from a natural
disaster - parasitism and disease
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33Human population growth has slowed down in
- China.
- the United States.
- India.
- Africa.
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34Demography is the scientific study of
- parasitism and disease.
- modernized countries.
- human populations.
- none of the above
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35Demographic transition is change from high
birthrates and high death rates to
- exponential growth.
- a low birthrate and a low death rate.
- a low birthrate and a high death rate.
- indefinite growth.
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36About 500 years ago, the worlds population
started
- decreasing.
- to reach carrying capacity.
- growing more rapidly.
- to level off.
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37Countries in the first stage of demographic
transition have
- a low death rate and a high birthrate.
- a high death rate and a low birthrate.
- a slowly growing population.
- more old people than young people.
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38Demographic transition begins with changes in
society that
- lower the birthrate.
- increase the birthrate.
- lower the death rate.
- increase the death rate.
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39The human population experienced exponential
growth after
- agriculture began.
- plowing and irrigation began.
- the bubonic plague began.
- the Industrial Revolution began.
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40Which country has not yet completed the
demographic transition?
- United States
- India
- Great Britain
- Japan
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41The anticipated human population by the year 2050
is about
- 7.8 billion.
- 9 billion.
- 9 trillion.
- 78 billion.
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42In Rwanda, there are more young children than
teenagers, and more teenagers than adults. This
age structure indicates a population that
- has stopped growing.
- will double in 30 years.
- has a steady growth rate.
- will decrease in 30 years.
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43In countries like India, the human population is
growing
- exponentially.
- transitionally.
- logistically.
- demographically.
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44Most of the worldwide human population is growing
exponentially because
- 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.
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45How can a diagram of a populations age structure
predict how it can grow?
- 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
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46The number of individuals per unit area is a
populations growth rate. ________________________
_
- True
- False
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47If the death rate of a population is greater than
the birthrate, the population shrinks.
_________________________
- True
- False
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48There are about four million births per year in
the United States. This statistic is a population
dynamic called growth rate. ______________________
___
- True
- False
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49Logistic growth occurs when a populations growth
slows or stops, following a period of rapid
growth. _________________________
- True
- False
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50Under conditions of logistic growth, population
size will rise and fall around an average point
called the carrying capacity. ____________________
_____
- True
- False
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51The exponential model of population growth
accounts for the influence of carrying capacity.
_________________________
- True
- False
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52One of the best-known mechanisms of population
control is the parasite-host relationship.
_________________________
- True
- False
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53Predators can limit the size of populations by
weakening their hosts, resulting in disease or
death. _________________________
- True
- False
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54Human activities, such as damming rivers, are
density-independent limiting factors.
_________________________
- True
- False
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55Density-dependent limiting factors affect all
populations, whether the population size is two
or a hundred. _________________________
- True
- False
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56Resource shortages triggered by increasing
population size are density-independent limiting
factors. _________________________
- True
- False
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57The size of the human population tends to
increase with time. _________________________
- True
- False
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58The human population grew slowly from the
beginning of human existence, and then began to
grow exponentially about 200 years ago.
_________________________
- True
- False
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59The 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. _________________________
- True
- False
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60An indication that a country has completed the
demographic transition is a low birthrate and a
low death rate. _________________________
- True
- False
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61Participant Scores
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62A population can be characterized by its
geographic distribution, density, growth rate,
and _________________________.
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63Emigration can cause a population to
____________________ in size.
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64When an individual moves into one population from
a different population, it is called
____________________.
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65Under ideal conditions with unlimited resources,
a population will grow ____________________.
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66Zero population growth is a characteristic of
____________________ population growth.
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67A population of bacteria with a limited supply of
nutrients will eventually show growth typical of
the ____________________ model.
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68If an entire wolf population dies, the moose
population on which it preys will grow to the
environments ____________________.
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69Competition, predation, parasitism, and
____________________ are density-dependent
limiting factors.
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70Density-dependent ____________________ factors in
natural populations help keep them from
increasing indefinitely.
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71The rise-and-fall cycle of a predator-prey
relationship is a density-____________________
relationship.
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72A 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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73The change in growth rate that results from the
change in birthrates and death rates is known as
a ______________________________.
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74During early human history, the growth rate was
low because the birthrate was high and the death
rate was ____________________.
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75Social and ____________________ factors explain
why some countries have high growth rates,
whereas other countries grow slowly or not at all.
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76The exponential growth rate of some countries
indicates that these countries have not yet fully
____________________ socially and economically.
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77What are four main characteristics of a
population?
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78How does emigration affect population size?
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79If 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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80Why must wildlife biologists consider immigration
and emigration when studying certain animals?
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81Describe the graph of exponential growth.
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82Describe the period of growth on a logistic
growth curve just before carrying capacity is
reached.
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83What is a limiting factor? Give two or three
examples
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84What is a density-independent limiting factor?
Give two or three examples
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85What are some factors that keep a population from
growing further once it reaches the carrying
capacity of its environment?
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86Why did the human population begin growing
exponentially about 500 years ago?
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87What kept the human growth rate low before the
Industrial Revolution?
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88How can a demographer, or scientist who studies
demography, predict how a population will change
in the future?
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89What are some of the factors that economists
believe will overcome the negative impacts of the
growth of the human population?
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90How does population growth in the United States
compare with that in China and India?
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91What evidence is there that Japan has completed
the demographic transition?
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92How can different population sizes affect density
in areas of the same size? Give an example
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93Discuss four ways population sizes can change.
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94Differentiate between exponential and logistic
growth.
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95Explain the limiting factors that control
population growth.
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96Explain how predator and prey populations limit
each others growth rates.
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97Differentiate between density-dependent and
density-independent limiting factors.
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98Competition can be a major force behind
evolutionary change. How does this competition
relate to density-dependent competition?
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99Sequence the historical events that contributed
to the current human population growth.
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100Compare some ecologists view of world population
growth with that of some economists.
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101What is the future of worldwide population growth?
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