Innovative, authoritative, and captivating - Life is the most balanced experimentally-based biology text available. It offers an engaging and coherent presentation of the fundamentals of biology by describing the landmark experiments that revealed them. The ninth edition remains at the cutting edge of the subject through new authorship, new experimental content, more real-life examples, enhanced art, and new media tools. It also contains three new chapters on increasingly important topics: Nucleic Acids and the Origin of Life, Genomes, and Interaction Ecology. The book is supported by a companion website (www.whfreeman.com/thelifewire9e), which offers a wide variety of study tools to help revise effectively: Interactive Summaries, Animated Tutorials, Activities, Interactive Tutorials, Working with Data, Experiment Links, Flashcards, Key Terms, Suggested Readings, Tree of Life, Glossary, Math for Life, Survival Skills, and a Statistics Primer.