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Learning objective

Examine and explain the environmental factors that influence seed germination, focusing on the need for water, oxygen, and appropriate temperature.

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Cambridge IGCSE BiologyReproductionCore contentPractical objective

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Quick explanation

Examine and explain the environmental factors that influence seed germination, focusing on the need for water, oxygen, and appropriate temperature

  • This point belongs to Sexual reproduction in plants, especially Sexual reproduction in plants outcomes.
  • You need to be able to examine and explain the environmental factors that influence seed germination, focusing on the need for water, oxygen, and appropriate temperature.
  • The key ideas to know are Describe and Investigate.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DescribeInvestigate

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This objective helps connect Sexual reproduction in plants outcomes to exam-style questions, flashcards, and revision notes for Sexual reproduction in plants.

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Paper 6 structured question: Sexual reproduction in plants

Paper 6Alternative to PracticalPractical3 marks

Method

Method to Investigate Seed Germination

1. Place 10 seeds on moist filter paper in a Petri dish. 2. Keep the Petri dish in a warm place (25°C). 3. Observe and record the number of seeds that germinate after 3 days. 4. Repeat the experiment with seeds kept in a cold place (5°C). 5. Ensure all other conditions (water, oxygen) are the same.

  1. a

    Identify the independent variable in this investigation.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    Describe how you would ensure that oxygen is available to the seeds during the experiment.

    Aim for approximately 2 distinct marking points.

    [2]
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