This textbook has been written specifically to meet the needs of students following the AQA AS biology specification and provides thorough, carefully-structured coverage of the subject content. Comprehensive and exam focused, this textbook gives biology students topic-by-topic insight and advice, ensuring they are fully prepared for their exam. - Easily accessible for students with a simple layout and clear writing style - Examiner commentary throughout the book helps to consolidate students' understanding of key topics - Short answer and exam style questions test knowledge as well as revsion and exam skills