The competitors for the IBO Challenge II are those students selected by the National Biology Olympiad of their own country/region. Each country/region can enrol up to four students and all the enrolment procedures will be made by the Delegates of the NBOs. The organization of the IBO Challenge II will not have any contacts with the students during the enrolment procedures, only with their Delegates.

Any queries can be sent to

All instructions on how to perform the on-line exams will be made available to the Delegates.