Functioning Ecosystem - SS1 Biology Past Questions and Answers - page 1
1
Which term describes a series of organisms in which each one is a source of food for the next?
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A
Food chain
B
Food web
C
Producer
2
What is a complex network of interconnected food chains in an ecosystem called?
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A
Food chain
B
Food web
C
Trophic level
3
At which trophic level do primary producers belong?
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A
First trophic level
B
Second trophic level
C
Third trophic level
4
Which organisms obtain their energy by consuming other organisms?
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A
Producers
B
Consumers
C
Decomposers
5
Which organisms play a vital role in breaking down dead organic matter and recycling nutrients in the ecosystem?
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A
Producers
B
Consumers
C
Decomposers
6
How many trophic levels are usually present in a food chain or food web?
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A
Three
B
Four
C
 Six
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