IB Biology A2.2.7 Processes of life in unicellular organisms
IB Biology A2.2.7 Processes of life in unicellular organisms

IB Biology syllabusBiology SL/HLFirst assessment 2025
Practise linking unicellular structures and behaviours to life functions such as nutrition, homeostasis, response, metabolism and excretion.
How this is tested
- interpret Paramecium structures by linking them to functions such as homeostasis
- compare excretion in unicellular organisms with human organ-based excretion
- outline life functions using clear biological roles rather than naming alone
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