USA Biology Olympiad 2027 Open Exam — US hosts

CEE runs the USA Biology Olympiad. Its Open Exam is an individual online multiple-choice biology exam, taken in person under a licensed host teacher’s supervision at the registered school or authorized test center. There is no penalty for guessing. The Open Exam gives Honorable Mention certificates to the top 20% and Merit certificates to the top 30%. This listing covers initial Open Exam entry at US hosts. Progression to the semifinal requires both a qualifying score in the top 10% and US citizenship or lawful permanent residence; later national and international stages have additional selection and participation conditions.