Biology 

National Science Digital Library (NSDL) Pathway for biological sciences education.Over 13,063 reviewed resources covering 77 biological sciences topics are available. Includes animations, labs, documents, webcasts and more.

Scitable is an open online teaching/learning portal combining high quality educational articles authored by editors at NPG with technology-based community features to fuel a global exchange of scientific insights, teaching practices, and study resources.

More than 1,500 federally supported teaching and learning resources are included from dozens of federal agencies.

Produced by New Scientist Magazine, this site lets you search for jobs in biology, chemistry and the other sciences. International listings are included.

From the journal Science

Developed and maintained at the Institute of Biochemistry at the University of Cologne, BRENDA is a database of enzyme functional data for approximately 3,500 enzymes.

An amazing site stuffed full of biochemical information and data, including KEGG Ligand, KEGG Pathway (detailed, dynamic pathway diagrams of interaction networks and reaction networks), KEGG Genes (linking genomes to biological systems).

PubMed is just one of the many databases included here. This suite of databases (site map to these databases) has become the primary resource for all types of molecular biology information. Use the Entrez browser to search across the databases.

BioMedCentral is recognized as a major force in the emergence of open access publishing in the life sciences. This gateway to biomedical information includes both open access and subscription journals, all peer-reviewed.

Provides a server with a number of links and many mirrors. These sites contain e.g. information on the Union, its Commissions and Regional Associates, and its journals and other publications.

Produced by a trusted source, the publisher, ISI (publisher of the Web of Science), this is a good starting point for finding information on particular organisms on the Web. Search by organism name, geography or subject.