Suitable for all of the major advanced level courses in biology, this book aims to support students throughout their A level studies: from introductions that link with GCSE balanced science to the full range of material needed to get the best grades for modern courses. The text is fully matched to current terminology and modular courses, including support for the most popular option modules. Self-assessment questions with answers reinforce students' understanding as they work; major concepts are referenced to exercises that include the latest A Level paper questions; and full explanations of numerical exercise are provided.