Open Oregon Educational Resources
General Biology I: Survey of Cellular Biology (Mt Hood Community College Biology 101)
From the scientific method to the function of a cell, the eBook has it all. A useful resource provides a free biology textbook with a focus on context. The text begins with an overview of the process of scientific inquiry and biology...
Rice University
Biology for AP® Courses
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...
CK-12 Foundation
Ck 12: Life Science: 2.8 Plant Cell Structure
Explore the difference between animal and plant cells.