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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Diffusion

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Diffusion

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Paper 3Theory (Core)4 marks

Understanding diffusion is essential for studying biological processes.

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Role of Diffusion

Diffusion plays a critical role in various biological functions, including respiration and nutrient absorption.

  1. a

    Discuss the factors that affect the rate of diffusion in living organisms.

    Aim for approximately 4 distinct marking points.

    [4]

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Paper 3 structured question: Diffusion

Paper 3Theory (Core)3 marks

Description

Diffusion in Cells

Diffusion allows essential gases and nutrients to enter cells while enabling waste products to exit. This process is vital for maintaining cellular functions and homeostasis.

  1. a

    Explain the significance of diffusion in living organisms.

    Aim for approximately 3 distinct marking points.

    [3]