Book excerpt: Homework Helpers: Biology is a user-friendly review book that will make any student—or those trying to help them—feel like he or she has a private Biology tutor. The book covers all of the topics included in a typical one-year Biology curriculum, including: An approach to the study of biology using the scientific method and the skills and equipment used by most biologists. The concept of the cell as the unit of structure and function of all life. DNA and the chemical processes of inheritance. The evolution of life on this planet and how humans are part of the process. The study of the environments of life and how all life is interconnected on this planet. Each chapter includes detailed questions that allow students to assess how well they’ve mastered each idea. Not only does the author provide the right answers to these self-study questions, but also detailed explanations of why the wrong answers are wrong.