What could be more fascinating than the story of life? This new reference series reviews all the fundamental life-science concepts and examines all aspects of modern thinking about biology, ecology, evolution, genetics, microbiology, cell biology, and life forms including humans. This book explains the ways in which organisms adapt to deal with changes in their environment in order to achieve the ultimate goal of survival. Special features include numerous diagrams and illustrations, at-a-glance fact boxes, key "Science Words," and simple experiments to try at home.