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Cambridge IGCSE Combined Science 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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Food chains and food webs

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Paper 3Theory (Core)3 marks

Evaluate the role of decomposers in a food web.

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Role of Decomposers

Decomposers break down dead organic matter and recycle nutrients. Evaluate their importance in maintaining ecosystem health.

  1. a

    Evaluate Assess the significance of decomposers in a food web.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 3 structured question: Food chains and food webs

Paper 3Theory (Core)3 marks

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Impact of Species Removal

Consider a food web consisting of plants, herbivores, and carnivores. If one herbivore species is removed, analyze the potential effects on the food web.

  1. a

    Analyse Discuss the potential consequences of removing the herbivore species from the food web.

    Aim for approximately 3 distinct marking points.

    [3]