Collins AS Biology for AQA is the ideal resource to support you through the 2008 AQA GCE course. It has been developed with the help of AQA examiners to ensure a perfect match to the 2008 specification and provides everything you need to succeed in your exam. This book covers AQA Biology AS units: Unit 1 - Biology and Disease Unit 2 - The Variety of Living Organisms The book includes the following features: * How Science Works feature boxes and assignments * Real world science in context at the start of every chapter * Questions throughout the text, with answers provided in the back of the book * Key fact summaries throughout the text * Stretch and challenge boxes to push the most able students * Exam-style questions at the end of every chapter * Practice synoptic questions The website includes the following additional support material: * Mark schemes for exam-style questions from the book * Sample student answers to exam-style questions at 2 levels with examiner comments to show students how to achieve a higher grade * Guidance for ISAs to help students to achieve the best grades in their practical assessments * Mathematical and examination technique guidance to ensure that students know how to best prepare for and handle their exams. Also available from Collins: A2 Biology for AQA, covering AQA Biology A2 units: Unit 4 - Populations and Environment Unit 5 - Control in Cells and in Organisms