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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Food chains and food webs

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3

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1

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Topic

Food chains and food webs

Exam-style question

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Paper 3Theory (Core)1 marks

Understanding the role of consumers in ecosystems is essential for ecology.

Description

Role of Consumers

Consumers are organisms that obtain energy by consuming other organisms. They can be classified into herbivores, carnivores, and omnivores, each playing a unique role in the food chain.

  1. a

    Define the term 'consumer' in the context of an ecosystem.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Food chains and food webs

Paper 3Theory (Core)4 marks

Description

Ecosystem Dynamics

In an ecosystem, consumers interact with producers and decomposers to maintain balance. Herbivores feed on plants, while carnivores prey on herbivores. Omnivores can consume both.

  1. a

    Discuss the importance of consumers in maintaining ecosystem balance.

    Aim for approximately 4 distinct marking points.

    [4]