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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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Food chains and food webs

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Paper 3Theory (Core)1 marks

Understanding trophic levels in ecosystems

Description

Trophic Levels

A trophic level is the specific position of an organism within a food chain, food web, or ecological pyramid.

  1. a

    State what is meant by the term 'trophic level'?

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Food chains and food webs

Paper 3Theory (Core)2 marks

Diagram Description

Food Chain Example

Grass → Grasshopper → Frog → Snake

  1. a

    Identify the trophic level of the frog in this food chain.

    Aim for approximately 2 distinct marking points.

    [2]