Chapter 4:
Population Biology
Practice Test
1.
The carrying capacity of a population is the highest level at which a population can be __________.
a.
before it crashes
b.
sustained
c.
attained
d.
after it crashes
Hint
2.
What is the demographic trend in the United States?
a.
increasing birth rate
b.
zero growth
c.
decreasing fertility
d.
increasing death rate
Hint
3.
If the rate of population growth remains steady, the graph will appear as __________.
a.
a bell curve
b.
a J-shaped curve
c.
a S-shaped curve
d.
a straight line
Hint
4.
What can be said about the growth of a country whose age structure graph approximates a triangle with a large base?
a.
it is decreasing
b.
it is increasing rapidly
c.
it is increasing slowly
d.
it is stable
Hint
5.
The change in the size of a population over time is ________.
a.
population growth
b.
exponential growth
c.
linear growth
d.
ever-increasing growth
Hint
6.
Predation is a positive benefit to the population of prey organisms because it tends to keep them below their ___________.
a.
carrying capacity
b.
exponential growth
c.
competition level
d.
sustainable level
Hint
7.
Movement of individuals into a country is __________.
a.
population impact
b.
population degeneration
c.
emigration
d.
immigration
Hint
8.
As populations grow individuals tend to compete for __________.
a.
independence
b.
density
c.
resources
d.
stress
Hint
9.
Which of the following is a density-dependent factor?
a.
flood
b.
wind speed
c.
food
d.
drought
Hint
10.
What type of growth is exhibited by an hourly wage?
a.
straight line
b.
S-curve
c.
expansion pattern
d.
exponential
Hint
11.
Resource depletion and increasing population cause __________.
a.
community stability
b.
predators to increase
c.
exponential growth
d.
competition
Hint
12.
Density-dependent factors include factors such as __________, while density-independent factors include factors such as __________.
a.
competition; storms
b.
temperature; disease
c.
temperature; floods
d.
disease; parasites
Hint
13.
Populations that have reached carrying capacity usually have __________.
a.
increasing population size
b.
an S-shaped growth curve
c.
a J-shaped growth curve
d.
linear growth
Hint
14.
Competition, aggression, decrease in parental care, decreased fertility, decreased disease resistance and stress may all result from __________.
a.
overcrowding
b.
increased pollution
c.
global warming
d.
predation
Hint
15.
Living things are examples of __________.
a.
the carrying capacity
b.
abiotic factors
c.
biotic factors
d.
density independence
Hint
