This is an international edition of the widely used textbook GCSE Biology. It provides up-to-date and comprehensive coverage of the core and supplementary topics specified in the IGCSE Biology syllabus and is endorsed by Cambridge International Examinations.This is an international edition of the widely used textbook \\\GCSE Biology\\\. It provides up-to-date and comprehensive coverage of the core and supplementary topics specified in the IGCSE Biology syllabus. In particular: there is additional information on topics such as B and T lymphocytes, infertility, performance-enhancing hormones, fluoridation of water supplies, impact of hunting and over fishing and global warming; an additional chapter on selective breeding and cloning; an additional chapter on conservation which covers extinction, conservation of species, conservation of genes, conservation of habitats, and conservation of resources; a revised chapter on ecosystems includes information on adaptations and factors which affect communities; a final chapter on observation and experiment looks at the type of questions that can be investigated scientifically and the nature of evidence; and past examination questions have been updated.