This text covers all the major topics in general biology with clarity and precision. The book distils main concepts and outlines the research trends in the field. The principles of evolution and energy flow are used as a conceptual framework throughout. This seventh edition has been improved. As with every new edition, the authors continue to aim to simplify and enliven the writing without sacrificing accuracy.This text covers all the major topics in general biology with clarity and precision. The book distils main concepts and outlines the research trends in the field. The principles of evolution and energy flow are used as a conceptual framework throughout. This seventh edition has been improved. As with every new edition, the authors continue to aim to simplify and enliven the writing without sacrificing accuracy.