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Cambridge IGCSE Biology practice

Paper 4 structured question: Adaptive features

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Adaptive features

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Paper 4Theory (Extended)4 marks

Comparison of hydrophyte and xerophyte adaptations

Diagram Description

Leaf adaptations of hydrophytes and xerophytes

Diagram shows a hydrophyte leaf with large air spaces and stomata on the upper surface, and a xerophyte leaf with thick cuticle, sunken stomata, and reduced leaf surface area.

  1. a

    State one adaptation of hydrophytes shown in the diagram.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    Explain how two adaptations of xerophytes shown in the diagram help reduce water loss.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 4 structured question: Adaptive features

Paper 4Theory (Extended)6 marks

Description

Adaptations of Hydrophytes and Xerophytes

Hydrophytes live in aquatic environments and have adaptations such as large air spaces and stomata on the upper leaf surface. Xerophytes live in dry environments and have adaptations like thick cuticles and sunken stomata.

  1. a

    Identify two adaptations of hydrophytes that help them survive in water.

    Aim for approximately 2 distinct marking points.

    [2]
  2. b

    Explain how two adaptations of xerophytes help them survive in dry environments.

    Aim for approximately 4 distinct marking points.

    [4]