The diagrams are extremely helpful. A general biology site, containing information that is graded according to the age of the students it is aimed at. From age 4 to postgraduates. All areas of Biology . Excellent resources covering all areas of biology.
Students also have the opportunity to ask questions to the experts.
Some of the material is aimed at younger students, but there is a lot that would be useful for undergraduates. General Biology . The site is a virtual library - an excellent place to go to look up almost any biological information. Contains links to biological resources for all levels. A very good general site, with guide pages that make it easier to find the information you are looking for.