IGCSE Biology / Life processes

Practical: showing that respiring seeds give out carbon dioxide and heat

Edexcel International GCSE Biology (4BI1), chapter 1: Life processes, specification point 2.39. Part of the full course.

Read the revision notes · IGCSE Biology past papers

Germinating seeds respire quickly, releasing carbon dioxide and heat. These experiments use dead seeds as controls so you can link each change to respiration in living seeds.

More lessons in Life processes

• The characteristics of living organisms
• Animal and plant cells under the microscope
• The light microscope and magnification
• Temperature, pH and denaturing
• Practical: measuring enzyme activity
• Anaerobic respiration and how it differs from aerobic
• Practical: enzymes and food
• Aerobic respiration and ATP
• Diffusion
• Osmosis
• Active transport
• What changes the rate of movement
• Stem cells and differentiation
• Cells, tissues, organs and systems
• Enzymes and the active site