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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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4

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Food chains and food webs

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Paper 3Theory (Core)4 marks

The balance of ecosystems relies on various organisms, including consumers.

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]

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Paper 3 structured question: Food chains and food webs

Paper 3Theory (Core)1 marks

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]