Below is a matter of national biology olympiad used in the selection and national competitions (OSN) and international. You can download it by clicking the link below. You can use this problem to train your students to become Olympic champion in the competition of biology. Good luck.
Soal Olimpiade Biologi SMA 2011 part 2 download
You may be able to find questions that are used in biology olympiad national and international level by clicking the link below.