内容简介：
Gareth Stevens Vital Science books are designed to help prepare students for NCLB science testing. The eight volumes in Life Science use clear explanations and a variety of photographs, illustrations, and detailed diagrams to help students understand biological structures and processes. Subjects covered include the human body, cells, characteristics and classification of living things, plants, heredity, animals, simple life-forms, and how life changes. This series will serve as a comprehensive and indispensable resource for students studying life science.