Our comprehensive review of SBO past papers highlights key trends, topics, and question types that can inform students' preparation for the competition. The most frequently tested topics were Cell Biology, Genetics and Evolution, and Ecology and Ecosystems. The majority of questions were multiple-choice questions, with a mix of recall-type, application-type, and analysis-type questions. The difficulty level of the questions varied, with a significant proportion of hard questions that required in-depth knowledge and critical thinking.