Palomar Community College District
Wayne's Word: The Castor Bean: Plant Named After a Tick
A fascinating article on the natural history and biochemistry of castor oil. There are sections that are basic and descriptive as well as more technical information.
CK-12 Foundation
Ck 12: Biology: Bioterrorism
[Free Registration/Login may be required to access all resource tools.] Describes how bioterrorism threatens human health.