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Chapter 5 Populations

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
Which of the following is NOT one of the factors that play a role in population growth rate?
a.
immigration
c.
emigration
b.
death rate
d.
demography
 

 2. 
One of the main characteristics of a population is its
a.
change over time.
c.
dynamics.
b.
geographic distribution.
d.
habitat.
 

 3. 
Sea otters are important to the populations of
a.
kelp.
c.
killer whales.
b.
sea urchins.
d.
all of the above
 

 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?
a.
growth rate
c.
age structure
b.
geographic distribution
d.
population density
 

 5. 
What does the range of a population tell you that density does not?
a.
the number that live in an area
c.
the births per unit area
b.
the areas inhabited by a population
d.
the deaths per unit area
 

 6. 
Which of the following tells you population density?
a.
the number of births per year
b.
the number of frogs in a pond
c.
the number of deaths per year
d.
the number of bacteria per square millimeter
 

 7. 
The movement of organisms into a given area from another area is called
a.
immigration.
c.
population shift.
b.
emigration.
d.
carrying capacity.
 

 8. 
When organisms move out of the population, this is known as
a.
emigration.
c.
immigration.
b.
abandonment.
d.
succession.
 

 9. 
What must occur in a population for it to grow?
a.
The birthrate becomes higher than the death rate.
b.
The birthrate stays the same and the death rate increases.
c.
The birthrate becomes lower than the death rate.
d.
The birthrate and the death rate remain the same.
 

 10. 
What is happening in a population as it decreases?
a.
The birthrate and the death rate remain the same.
b.
The death rate becomes lower than the birthrate.
c.
The death rate stays the same and the birthrate increases.
d.
The death rate becomes higher than the birthrate.
 

 11. 
When individuals in a population reproduce at a constant rate, it is called
a.
logistic growth.
c.
exponential growth.
b.
growth density.
d.
multiple growth.
 

 12. 
As resources in a population become less available, the population
a.
declines rapidly.
c.
reaches carrying capacity.
b.
increases slowly.
d.
enters a phase of exponential growth.
 

 13. 
In a logistic growth curve, exponential growth is the phase in which the population
a.
reaches carrying capacity.
c.
growth begins to slow down.
b.
grows quickly.
d.
growth stops.
 

 14. 
All of the following are limiting factors EXCEPT
a.
immigration.
c.
predation.
b.
competition.
d.
human disturbances.
 

 15. 
Which of the following is NOT likely to be a limiting factor on the sea otter population?
a.
disease
c.
drought
b.
competition
d.
predation
 

 16. 
Which will reduce competition within a species’ population?
a.
fewer individuals
c.
fewer resources
b.
higher birthrate
d.
higher population density
 

 17. 
If a population grows larger than the carrying capacity of the environment, the
a.
death rate may rise.
c.
death rate must fall.
b.
birthrate may rise.
d.
birthrate must fall.
 

 18. 
Water lilies do not grow in desert sand because water availability to these plants in a desert is
a.
a limiting factor.
c.
a competition factor.
b.
the carrying capacity.
d.
none of the above
 

 19. 
Each of the following is a density-dependent limiting factor EXCEPT
a.
competition.
c.
crowding.
b.
seasonal cycles.
d.
disease.
 

 20. 
Which would be least likely to be affected by a density-dependent limiting factor?
a.
a small, scattered population
b.
a population with a high birthrate
c.
a large, dense population
d.
a population with a high immigration rate
 

 21. 
Which of the following is a density-independent limiting factor?
a.
earthquake
c.
emigration
b.
disease
d.
parasitism
 

 22. 
A disease resulting in the deaths of one third of a dense population of bats in a cave would be a
a.
density-dependent limiting factor.
c.
density-independent limiting factor.
b.
result of exponential growth.
d.
nutrient-limiting factor.
 

 23. 
Human population growth has slowed down in
a.
China.
c.
India.
b.
the United States.
d.
Africa.
 

 24. 
Demography is the scientific study of
a.
parasitism and disease.
c.
human populations.
b.
modernized countries.
d.
none of the above
 

 25. 
Demographic transition is change from high birthrates and high death rates to
a.
exponential growth.
c.
a low birthrate and a high death rate.
b.
a low birthrate and a low death rate.
d.
indefinite growth.
 

 26. 
About 500 years ago, the world’s population started
a.
decreasing.
c.
growing more rapidly.
b.
to reach carrying capacity.
d.
to level off.
 

 27. 
Countries in the first stage of demographic transition have
a.
a low death rate and a high birthrate.
c.
a slowly growing population.
b.
a high death rate and a low birthrate.
d.
more old people than young people.
 

 28. 
The human population experienced exponential growth after
a.
agriculture began.
c.
the bubonic plague began.
b.
plowing and irrigation began.
d.
the Industrial Revolution began.
 

 29. 
Which country has not yet completed the demographic transition?
a.
United States
c.
Great Britain
b.
India
d.
Japan
 

 30. 
In countries like India, the human population is growing
a.
exponentially.
c.
logistically.
b.
transitionally.
d.
demographically.
 

 31. 
Most of the worldwide human population is growing exponentially because
a.
human populations have not reached their exponential curve.
b.
most countries have not yet completed the demographic transition.
c.
human populations do not conform to the logistic model.
d.
the food supply is limitless.
 

 32. 
How can a diagram of a population’s age structure predict how it can grow?
a.
It shows how many people are at reproductive ages.
b.
It shows how many people will probably die within a few years.
c.
It shows how many people are entering the population by birth.
d.
all of the above
 



 
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