Microscopes - AS Biology Revision - OCR (Unit 1.1.1.)

Microscopes. AS Biology. OCR Exam Board. Unit 1.1.1. The "You need to know..." section has come from the OCR specification. By an AS Biology student. Music: Early Birdie - Owl City (If you don't like the music, just mute it. There's no info through audio :)) thanks! :D