One of a brand new series for A Level students, this book covers all the key content needed for AS Biology, presented in accessible note form and compiled by top examiners. Individual pages are hole-punched and can easily be removed for insertion into students' own files. The Collins Revision Notes series has been specially designed to give students the best possible help as they approach their AS exams. The content is presented in a highly visual form, using bullet points, flowcharts, tables, diagrams, highlighting and artwork so that all key points are instantly obvious and easy to revise.