This volume offers full coverage of the A-level Biology syllabus within a single comprehensive text book. Experts in specific aspects of the subject provide items on areas of special interest and controversial issues, encouraging student discussion and providing opportunities for in-depth study. Guest authors include James Lovelock (the Gaia hypothesis), Sir Roy Calne (organ transplants), Anthony Pinching (how HIV damages the immune system), Jane Goodall (chimpanzee research), Baroness Warnock (ethics of embryo research), Anita Roddick (animal testing), Sir Andrew Huxley (nerve action) and Richard Dawkins (genes and evolution). Key features include : suitable for all current A- and AS-level Biology, Social Biology and modular syllabuses; 44 up-to-date chapters covering every aspect of the subject; written to ensure continuity from GCSE and National Curriculum Science; each chapter contains review questions, a summary and suggestions for further reading; boxes written by international experts on particular aspects; avoidance of excessive terminology, in line with the Institute of Biology recommendations; biotechnology and social aspects of biology are recurring themes throughout the book; and the text has been written so as to make the book fully accessible and enjoyable for a wide range of abilities.