Advanced. For Teenagers and Adults.From ABA, accessory molecules and altruism to X-ray diffraction, yeasts and zygotes, the language of biology is rich, complex and constantly expanding. This Penguin Dictionary, now in its tenth extensively updated edition, has long been established as the definitive guide to the subject, defining over 7.500 terms, explaining fundamental concepts, and exploring the latest discoveries and developments. - ideal for students, teachers, professionals and amateur biologists - in-dept definitions of all key botanical and zoological concepts as well as the core vocabulary of immunology, palaeoanthropology, evolutionary theory and ecology - over 400 new entries to take account of the latest thinking on genetics, cell biology, human physiology and disease - extensively illustrated throughout