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Cambridge IGCSE Biology practice

Paper 3 structured question: Food chains and food webs

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Attempt questionFood chains and food webs revisionRevise the key idea

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2

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Food chains and food webs

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Paper 3Theory (Core)2 marks

Decomposers help recycle nutrients by breaking down dead organic matter.

Description

Importance of Decomposers

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

  1. a

    State why decomposers are important in ecosystems.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 3 structured question: Food chains and food webs

Paper 3Theory (Core)1 marks

Description

Role of Decomposers

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

  1. a

    Describe what a decomposer is.

    Aim for approximately 1 distinct marking point.

    [1]