Gene therapy. Forensic DNA profiling. Biochemistry. Biotechnology. Cloning. Stem Cells. Super Bugs. Genetically modified food. Botany. Zoology. Sex. The study of life and living organisms is ancient, broad and ongoing. Biology combines the Greek word for life, bios, with the suffix ology, or science/study/knowledge of. The new, completely revised and updated The Handy Biology Answer Book, examines, explains, and traces mankind's understanding of this important topic.