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DATE: ______________
Ecology Test Review Guide (Ch. 34, 35, & 36)
CHAPTER 35
Answer the question or define the following terms:
Define Population
density & write
formula:
Exponential growth/
“J Curve” & draw.
Logistic growth/ “S
Curve” & draw.
Label “carrying
capacity”
Define “carrying
capacity”
What is the Earth’s
current population?
What are densitydependent limiting
factors?
Give 4 examples.
What are densityindependent
limiting factors?
Give 4 examples.
Interspecific
competition
And example.
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What is competitive exclusion?
Symbiotic relationships below:
Briefly define
Give 1 example
Parasitism
Mutualism
Commensalism
The kind of succession where there is no preexisting soil, like after a volcanic eruption or a
glacier melt.
The kind of succession that take place when a disturbance leaves the soil intact, as in clear-cutting
or forest fire.
What are PIONEER organisms?
List the order species inhabit a primary succession site:
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CHAPTER 36
Answer the question or define the following terms:
Know:
Producer, consumer, decomposer
Define a trophic level
Label in picture:
- Primary consumer
- Tertiary consumer
- Secondary
consumer
- Producer
Draw an energy
pyramid,
demonstrating the
“10% Rule”.
Draw a biomass
pyramid.
Draw a pyramid of
numbers.
What issues come
about from having
too much CO2 in the
atmosphere?
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What produces
excess CO2?
Explain what causes
eutrophication and
why it is an
environmental
problem
Describe greenhouse effect & global warming
What types of countries show
low to zero population growth
rates?
What types of countries show
high growth rates?
What factors contributed to the
increase in the human
population in the last 500 year?
Name at least 3.
CHAPTER 34
Answer the question or define the following
terms:
biotic factor
abiotic factor
Population
Community
Ecosystem
Biosphere
Habitat
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Practice Multiple Choice [optional]
1. If there are 50 alligators in a swamp that measures 10 square kilometers (km2), what is the
alligators’ population density?
a. 10 alligators/km2
c. 50 alligators/km2
b. 5 alligators
d. 5 alligators/km2
2. A species of bacteria in a laboratory undergoes exponential growth, reproducing every 30 minutes.
Starting with one bacterial cell, how many bacterial cells will there be after 3 hours?
a. 6
c. 90
b. 64
d. 270
3. Which of the following is an example of a density-dependent factor that limits population growth?
a. hurricane
c. food availability
b. flood
d. drought
4. Poison ivy often climb tree trunks toward light. They do not harm the trees. What form of
symbiotic relationship is this?
a. mutualism
c. predation
b. commensalism
d. parasitism
5. Which of the following is an example of primary succession?
a. Trees start growing in a meadow
c. Lichens grow on lava rock after a volcanic
b. Wildflowers colonize abandoned
eruption
farmland.
d. Weeds grow in the soil of an empty city lot.
**You can view some short answer examples in your text on Page 784.**
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