IB Biology HL 4.2.4 Mesocosms
Practise analysing HL mesocosm evidence, comparing laboratory and sea studies and evaluating control of ecological variables.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Evaluate mesocosm advantages and limitations for controlling ecological variables.
- Compare laboratory and natural mesocosms using validity, safety and environmental realism.
D4.2.4—Mesocosm model question 1
An investigation into food web interactions was conducted in mesocosms in the Mediterranean Sea, off the coast of France. The effects of the addition of soil and fish on bacterial populations were tested.
Suggest advantages of undertaking this experiment in the sea rather than in the laboratory.
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