Scientists Online version of the 1998 book from the National Academy of Sciences Press - analyses trends in employment and further training of life scientists over the past 30 years. Be sure to read any fine print or copyright statements before using these images in publications or even course-related Web sites. This site contains hundreds of images organized into three sections covering Zoology, Botany, and Histology. All images can be used for non-commercial purposes. Biology Image Archive Images of flowering plants and fungi, from Cornell University.
Images are available for non-commercial educational and research use.
From the General Botany course at the University of Wisconsin-Madison, this is a gopher site which features hundreds of good images of plants, fungi, some protista. Chemist's Art Gallery Visualizations and animations of various chemical and biological compounds and structures. Image Library of Biological Macromolecules Amino acids, proteins, DNA, RNA, and more. Probably easiest to use via the alphabetical compound list . From Florida State University.