Providing complete step-by-step coverage of the 2008 Edexcel GCE Biology specification, Salters-Nuffield Advanced Biology (SNAB) is the official support material for the context-led approach to the specification. Written by the University of York Science Education Group (UYSEG) and Nuffield Curriculum Centre, this Students' Book offers students motivating and relevant content to improve exam performance and ensure students fulfil their full potential.