Informational site featuring biology news, organisms, newsletters and a search engine for biology.
http://www.biologybrowser.com/
An evolving online tribute to all ocean life, marine biology, and marine conservation. A nonprofit volunteer organization of marine biologists, students, professors, and conservation advocates.
http://marinebio.org/
Online journal for nature cell biology, including press releases, archives and current issues.
http://www.nature.com
Online biology book with table of contents for all of your biology questions and needs.
http://www.emc.maricopa.edu
Informational source for biology essentials, topics and tools.
http://biology.about.com/
Source for biology of reproduction, including papers in press and mini reviews.
http://www.biolreprod.org/
Informational biology resource including, biology tutorials, dictionary of biology and the latest discussions.
http://www.biology-online.org/
Online source for cell and molecualr biology, including research communication and education.
http://www.cellbio.com/
Informational site pertaining to molecular and cellular biology.
http://www.mcb.harvard.edu
Online source for the third edition of The Dictionary of Cell and Molecular Biology.
http://www.mblab.gla.ac.uk/