Download Biology Chapter 5 Section 2 Review

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Biology Chapter 5 Section 2 Review
Multiple Choice
Identify the choice that best completes the statement or answers the question.
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1. 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
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2. Which will reduce competition within a species’ population?
a. fewer individuals
c. fewer resources
b. higher birthrate
d. higher population density
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3. 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
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4. Which density-dependent factors, other than the predator/prey relationship, affected the populations of moose
and wolves on Isle Royale?
a. extreme temperatures for the moose and flooding for the wolves
b. parasitic wasps for the wolves and clear-cut forest for the moose
c. a hurricane followed by drought for both moose and wolves
d. food availability for the moose and disease for the wolf
Completion
Complete each statement.
5. Resource shortages triggered by increasing population size are density-____________________ limiting
factors.
Short Answer
6. What is a density-independent limiting factor? Give two examples.
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Essay
7. Explain the limiting factors that control population growth.
8. Differentiate between density-dependent and density-independent limiting factors.
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Other
USING SCIENCE SKILLS
Graph I shows the curve for a culture of Paramecium aurelia. Graph II shows the growth curve for a culture
of Paramecium caudatum, a larger species. Graph III shows the growth curves of each species when they are
grown together.
Figure 5–1
9. Drawing Conclusions Are the limiting factors for all cultures in Figure 5-1 density-dependent or
density-independent? Explain.
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Biology Chapter 5 Section 2 Review
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
ANS:
ANS:
ANS:
ANS:
C
A
A
D
PTS:
PTS:
PTS:
PTS:
1
1
1
1
REF:
REF:
REF:
REF:
p. 124
p. 125
p. 125
p. 126
COMPLETION
5. ANS: dependent
PTS: 1
REF: p. 125
SHORT ANSWER
6. ANS:
A density-independent limiting factor is a limiting factor that affects all populations regardless of size, such as
a rainstorm, drought, fire, and certain human activities.
PTS: 1
REF: p. 125
ESSAY
7. ANS:
Under ideal conditions, populations will continue to grow if there are not factors that limit their growth. Some
factors in a population’s environment that can limit growth are predation, competition, parasitism, and
disease. Other limiting factors are climate extremes and human activities.
PTS: 1
REF: p. 124
8. ANS:
Density-dependent limiting factors become limiting only when population density—the number of organisms
in a given area—reaches a certain level. These factors include competition, predation, parasitism, and disease.
Density-independent limiting factors affect all populations in similar ways, regardless of population size.
These limiting factors include weather, natural disasters, and certain human activities, such as damming rivers
and clear-cutting forests.
PTS: 1
REF: p. 125 | p. 127
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OTHER
9. ANS:
The limiting factors are density-dependent. In Graphs I and II, the population growth rate decreased and
leveled out when the population size reached carrying capacity, as did P. aurelia in Graph III.
PTS: 1
REF: p. 125
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