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Identify and discuss the limiting factors that affect photosynthesis under various environmental conditions.

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Cambridge IGCSE BiologyPlant nutritionSupplement content

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Identify and discuss the limiting factors that affect photosynthesis under various environmental conditions

  • This point belongs to Photosynthesis, especially Photosynthesis outcomes.
  • You need to be able to identify and discuss the limiting factors that affect photosynthesis under various environmental conditions.
  • The key ideas to know are Explain and Identify.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

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ExplainIdentify

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Paper 4 structured question: Photosynthesis

Paper 4Theory (Extended)5 marks

Description

Limiting Factors in Photosynthesis

The rate of photosynthesis depends on light intensity, carbon dioxide concentration, and temperature. Each of these factors can limit the rate if they are not at optimal levels.

  1. a

    Identify two limiting factors that affect the rate of photosynthesis.

    Aim for approximately 2 distinct marking points.

    [2]
  2. b

    Explain why temperature can limit the rate of photosynthesis.

    Aim for approximately 3 distinct marking points.

    [3]
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