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Cambridge IGCSE Biology practice

Paper 4 structured question: Transpiration

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Transpiration

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Paper 4Theory (Extended)2 marks

Environmental factors affect the rate of transpiration in plants.

Description

Transpiration Factors

Consider how temperature, wind speed, and humidity influence the rate at which water vapor is lost from plant leaves.

  1. a

    Explain how temperature affects the rate of transpiration.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 4 structured question: Transpiration

Paper 4Theory (Extended)4 marks

Description

Effect of Wind and Humidity on Transpiration

Describe how wind speed and humidity affect the rate of transpiration in plants.

  1. a

    Explain the effect of wind speed on transpiration rate.

    Aim for approximately 2 distinct marking points.

    [2]
  2. b

    Explain how high humidity affects transpiration rate.

    Aim for approximately 2 distinct marking points.

    [2]