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Cambridge IGCSE Biology practice

Paper 3 structured question: Food chains and food webs

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3

Paper

2

Marks

Topic

Food chains and food webs

Exam-style question

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Paper 3Theory (Core)2 marks

The pond food web shows that some insects eat both algae and small fish.

Diagram Description

Pond Food Web

The food web includes algae, insects, small fish, frogs, and birds. Arrows show feeding directions: algae → insects → small fish → frogs → birds. Some insects also eat algae and small fish.

  1. a

    Describe how the food web shows the feeding relationships between organisms.

    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

Diagram Description

Pond Food Web

The food web includes algae, insects, small fish, frogs, and birds. Arrows show feeding directions: algae → insects → small fish → frogs → birds. Some insects also eat algae and small fish.

  1. a

    Describe what a food web is.

    Aim for approximately 1 distinct marking point.

    [1]