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Registering a backlink to your site in web directories is one way you can improve your position in Google. For more information, see Seo Tip.

Biology

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Science & Plants for Schools - Science & Plants for Schools - free teaching resources for science and plant biology, for primary, secondary and A-level
iBiology - iBiology offers you free biology videos from the world's leading scientists, with over 25 Nobel laureates. Talks include research and educational materials.
EMBL Heidelberg - The European Molecular Biology Laboratory (EMBL) is Europe's flagship laboratory for basic research in molecular biology. EMBL operates from five sites: the main laboratory in Heidelberg, and Outstations in Hinxton (EBI), Grenoble, Hamburg, and Monterotondo near Rome.