An understanding of biodiversity is an important requirement of a wide range of programmes of study including biology, zoology, wildlife conservation and environmental science. This book is a study and revision guide for students following such programmes in which biodiversity is an important component. It contains 600 multiple-choice questions (and answers) set at three levels - foundation, intermediate and advanced - and grouped into 10 major topic areas: 1. Principles of classification and taxonomy 2. Comparative anatomy and physiology3. Protoctists, monerans, fungi, lichens and acellular organisms4. 'Lower' plants and pteridophytes 5. Seed-bearing plants6. Sponges, cnidarians, nematodes and minor animal phyla7. Platyhelminths, annelids and molluscs8. Arthropods and echinoderms9. Fishes, amphibians and reptiles10. Birds and mammalsThe book has been produced in a convenient format so that it can be used at any time in any place. It allows the reader to learn and revise the meaning of terms used in animal and plant classification, the principles of comparative physiology, and the characteristics of, and diversity in, the major animal and plant taxa. The structure of the book allows the study of one topic area or group of taxa at a time, progressing through simple questions to those that are more demanding. Many of the questions require students to use their knowledge to identify organisms and biological structures from drawings or photographs.