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...

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...

Explore the evidence for evolution: anatomy, molecular biology, biogeography, fossils, & direct observation.

Explore the evolution and ecology of amphibians.

Explore the molecular evidence for evolution.

Explore the theory of evolution by means of natural selection.

Find out how evolution happens due to chance events. Explore the bottleneck effect and founder effect.

Explore some different areas of study in the life sciences.