D4.2.4—Mesocosm model Topic Practice
D4.2.4—Mesocosm model Topic Practice

IB Biology syllabusBiology SL/HLFirst assessment 2025
Practise using mesocosm examples to analyse controlled ecosystem experiments, sustainability indicators and changes in biomass or temperature.
How this is tested
- explain why mesocosms help control variables and isolate populations
- interpret sustainability from recycling of wastes in a sealed system
- predict which factors vary in closed mesocosms while carbon is conserved
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