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Topic 1.3
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1
Decomposers…
A)get their energy by consuming plants only.
B)get their energy by consuming animals only.
C)get their energy through the process of photosynthesis.
D)get their energy by consuming dead plant and animal matter.
2
Which of the following relationships could be part of a general nutrient cycle?
A)consumer → producer → decomposer → nutrient substance
B)producer → consumer → decomposer → nutrient substance
C)nutrient substance → consumer → producer → decomposer
D)Heat → producer → heat → consumer
3
During cellular respiration, organisms…
A)release oxygen.
B)release nitrogen.
C)take in carbon dioxide.
D)take in oxygen.
4
During photosynthesis, plants…
A)use glucose.
B)use nitrogen oxide.
C)give off oxygen.
D)give off carbon dioxide.
5
Global warming can be caused by…
A)extra carbon dioxide trapping heat in the atmosphere.
B)extra oxygen in the air trapping heat in the atmosphere.
C)reduction of oxygen, causing heat loss in the atmosphere.
D)reduction of carbon dioxide, causing heat loss in the atmosphere.
6
Nitrogen is…
A)a key building block for carbohydrates.
B)a key building block for proteins.
C)found only in plants.
D)found in the air and is easily used as a nutrient.
7
An algal bloom forms due to…
A)excess carbon in aquatic ecosystems.
B)excess nitrogen in aquatic ecosystems.
C)lack of nitrogen.
D)lack of nutrients.





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