This student-friendly CGP textbook comprehensively covers OCR A AS-Level Biology and Year 1 of OCR A A-Level Biology - and it's fully up-to-date for the new specifications for 2015 and beyond! It contains in-depth, accessible notes explaining every topic, supported by clear diagrams, photographs, tips and worked examples. To test students' knowledge and understanding, there are practice questions and exam-style questions throughout the book - with complete answers included. There's also detailed guidance on Maths Skills, Practical Investigations and indispensable advice for success in the final exams. An access-code for a free Online Edition is also included, allowing you to read the entire book on a PC, Mac or tablet.