| Feature | SJBO | IBO | USABO | | :--- | :--- | :--- | :--- | | | High (must know Phylum/Class for common animals) | Very high | Medium | | Plant physiology | Heavy (transpiration, phloem transport) | Heavy | Medium-light | | Singapore ecology | Specific (mangroves, tropical rainforest) | General | Temperate focus | | Practical exam | Yes (lab skills + written planning) | Yes | No (only open exam) |
: Visit the Singapore Institute of Biology (SIBiol) to check for any officially released sample questions or competition updates.
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