Unit 2Test Review: Ecosystem Structure and Function (Biosphere)
Name_____________________________________ Date___________________ Period________
DIRECTIONS: Answer the questions that follow….
Use the proper term for each level of organization being illustrated. Then explain how each picture describes
the term used. Your choices are…..population, community, organism, and ecosystem.
A.__________________________________________
Why?_______________________________________
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B. __________________________________________
Why?_______________________________________
C. __________________________________________
Why?_______________________________________
D. __________________________________________
Why?_______________________________________
*****If the pictures above are representing the tropical savanna biome, what would change as you entered
the tropical rain forest, or would there be a definite boundary line?
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Describe each of these species according to the role they play
within a given ecosystem.
1. Grass_____________________________________________
2. Grasshopper_______________________________________
3. Mouse____________________________________________
4. Snake____________________________________________
5. Fungus____________________________________________
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A.______________________________________
B.______________________________________
C.______________________________________
D.______________________________________
_______ % lost at each level as ______________
________% transferred to the next trophic level.
Label the above pyramid of energy, according to which species are represented at each trophic level.
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Study the food web below and use this to help you answer the following questions..
Why is Algae such a valuable species for this ecosystem?________________________________________
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What would happen to the Adelie penquin if we take out the Elephant seal?__________________________
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What would happen if we added more squid?__________________________________________________
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Biomass is the amount of living material in an ecosystem. What is the difference between a producer and a
consumer in terms of biomass? Why is this the case?
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How is solar energy transformed when it first enters an ecosystem?
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In the food chain: acorns  squirrels  fox  bacteria………what type of species is the squirrel?
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Explain what happens when we introduce a nonnative animal into an ecosystem.
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When chemist G. Tyler Miller stated, “Three hundred trout are needed to support one man for a year. The
trout, in turn, must consume 90,000 frogs, that must consume 27 million grasshoppers that live off of 1,000
tons of grass,” he was referring to the fact that:
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In autotrophs, where is light energy from the sun stored?______________________________________
Why are decomposers so important to ecosystems?___________________________________________
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Which type of ecosystem change is this?_______________________________________
Defend what you think using ecological succession terms.
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To ensure a stable ecosystem, is it better to have a variety of abiotic and biotic factors, or is it better to have the least
amount of variation with living/nonliving things? Why do you think this is the case?
_________________________________________________________________________________________________
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Describe the positive contributions of each cycle and the negative influences impacting each cycle….
Positive Contributions of each cycle….
Carbon Cycle
Nitrogen Cycle
Phosphorous Cycle
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Negative Influences on each cycles….
Carbon Cycle
Nitrogen Cycle
Phosphorous Cycle
****Review your climatograph handout****
Which biome is represented
here?
_________________________________________
How do you
know?___________________________________
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Out of the following options, which organism would have the lowest concentration of DDT?
A. Fish B. Marsh Water C. Predatory birds D. Plankton
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Diatom
Copepod
Herring
Salmon
Killer Whale
In the above food chain, if the Copepod had 900 available energy units, how
much would the Diatom have?
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On a separate sheet of paper, describe the following terms…
Biome, ecosystem diversity, organism, population, community, ecosystem, biosphere, laws of
thermodynamics, energy, photosynthesis, cellular respiration, trophic level, energy flow, types of
energy, pyramid of energy, food chain, food web, carbon cycle, nitrogen cycle, phosphorous cycle,
nitrogen fixation, denitrification, nitrification, ammonification, decomposition, bioaccumulation,
ecological succession, atom, molecules, chemical reactions, chemical formula, reactants, products.
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