Cambridge IGCSE Biology practice

Paper 3 structured question: Food chains and food webs

Try the question first, then check the answer and practise the same topic again.

At a glance

Paper

Marks

Topic

Food chains and food webs

Exam-style question

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Paper 3Theory (Core)1 marks

Decomposers play an important role in ecosystems by breaking down dead organic material.

Description

Decomposers obtain energy by feeding on dead or decaying organic matter, helping recycle nutrients in the environment.

a
Describe what a decomposer is.
Your answer
Aim for approximately 1 distinct marking point.
[1]

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Paper 3Theory (Core)2 marks

Description

Decomposers break down dead plants and animals, releasing nutrients back into the soil.

a
State why decomposers are important in ecosystems.
Your answer
Aim for approximately 2 distinct marking points.
[2]