How diverse are living things? Individuals explore topics such as cells as the foundation for life, cell division and genetics, molecular biology, and animal reproduction using an open resource Biology textbook. They learn key terms...

An eight-unit electronic textbook provides a guide to AP® Biology. Each of the 28 chapters include an introduction, multiple lessons, a summary, review questions, and test prep questions. Teachers see how each lesson connects to a big...

Physical and biological factors affect everyday living. Scholars explore electromagnetic forces, motion, the rock cycle, and geological changes. They examine cells as the building blocks of life and how organisms reproduce using images...

Explore a variety of science concepts in an interactive textbook created for middle school scholars. A lengthy table of contents takes readers to pages comprised of a subject overview, outline, and summary. Follow links further to find...

This is Chapter One from "Becoming Human: Evolution and Human Uniqueness," by Ian Tattersall. This chapter presents recent findings about the art and artifacts of early humans, and what those artifacts tell us about the intellectual...

Explore the evolution and ecology of amphibians.

This digital textbook covers core life science concepts and includes interactive features, real-world examples, and videos.