Fully revised and updated, this new fifth edition is the perfect guide for those studying biology, either at school or university. Containing many new entries, and with biographical entries on key scientists, it provides comprehensive coverage of biology, biophysics, and biochemistry. - Over 4,700 clear and concise entries - Over 50 pages of new material for this fifth edition, with all existing entries fully revised and updated - Feature articles on important topics such as genetically modified organisms - Chronologies chart the discoveries in the main fields of the subject.