Q21 of 163 Page 226

What is the role of decomposers in the ecosystem?

(B) Decomposers play a vital role in the ecosystem as they breakdown the organic components of dead and decaying matter into simpler substances. The organic matter is recycled in the ecosystem thus acting as cleansing agent for the environment.


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20

Explain the terms 'producer' and 'consumer'. Give two examples of producers and two of consumers.

 21

Define decomposers. Name one decomposer.

 22

What is meant by a primary consumer, secondary consumer and a tertiary consumer? Give one example of each.

 23

Give an example of a four step food chain operating in grassland. Name the secondary consumer in this food chain.