This test prep activity will help prepare your IB Biology students for upcoming tests or exam papers. This is a great way to re-visit IB Biology Themes that were learned earlier in the course. Students will use their knowledge of A1: Unity & Diversity - Molecules to solve the riddle. The 24 clues can also be used as a bell ringer, to provide extra practice or be available to challenge fast finishers. How To:1. Print pages 1 and 2 double sided for each of your students. 2. The clues on page 1 c