Written for a general biology course for non-majors, this second edition can be tailored to the topics covered in any course. In addition to the full-length, hardcover book, the reader can now choose from two paperback bindings of selected chapters. One book focuses on basic concepts and includes a brief survey of diversity. The other book has a human emphasis. The book focuses on basic principles: basic chemistry, cellular organization and function, metabolism, inheritance, evolution and ecology.