This revised and updated edition satisfies the requirements of the Cambridge Local Examinations Syndicate and London Examination syllabuses in Human and Social Biology at GCSE O-Level. The subject is covered with detailed information about the structures of the body and its physiology, providing a grounding in human biology. The social aspects of biology such as the population explosion, pollution, drug abuse, disease, food and sex are related to biological processes where appropriate, but also given full treatment in their own right. Practical tasks and activities are seen as essential, with full details given in each section, and are supported by, for example, photomicrographs to help students with their practical work. Where appropriate, students are encouraged to investigate local examples, an enquiry approach being taken throughout. Also included in this fourth edition, at the end of each chapter, are multiple choice, short answer and essay-type questions. By the author of " Human and Social Biology: Revision By Examination" , " Certificate Model Answers - Human and Social Biology" , " Certificate Model Answers - Health Science" , " Investigative Assignments in Biology" and " Ecology of Urbanization and Industrialization" .