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Cambridge IGCSE Biology practice

Paper 3 structured question: Conservation

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3

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5

Marks

Topic

Conservation

Exam-style question

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Paper 3Theory (Core)5 marks

Factors causing species to become endangered or extinct

Description

Threats to Organisms

Organisms face threats such as climate change, habitat loss, hunting, overexploitation, pollution, and the introduction of non-native species. These factors can reduce populations and lead to endangerment or extinction.

  1. a

    State two factors that can cause organisms to become endangered.

    Aim for approximately 2 distinct marking points.

    [2]
  2. b

    Explain how the introduction of non-native species can cause native species to become endangered.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 3 structured question: Conservation

Paper 3Theory (Core)4 marks

Description

Human Activities Affecting Species

Human activities such as hunting, pollution, and habitat destruction have significant effects on wildlife populations and biodiversity.

  1. a

    Identify one human activity that leads to habitat loss.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    Explain why overexploitation can cause a species to become endangered.

    Aim for approximately 3 distinct marking points.

    [3]