Biology (from Greek βιολογία – βίος, bios, “life”; -λογία, -logia) is the study of life and a branch of the natural sciences which studies living organisms and how they interact with each other and their environment. It examines the structure, function, growth, origin, evolution, and distribution of living things…Ref

With amazing tools that peer deep into cells, cell biologists are beginning to understand the structure, function and history of these highly organized, complex, chemical factories that are the building blocks of life.

Related links:

The Biology Project
Has tutorials and problem sets for learning biochemistry, cell, developmental, human, and molecular biology, Mendelian genetics, and immunology.
www.biology.arizona.edu

PLoS Biology – A Peer-Reviewed Open-Access JournalPLoS Biology is an open-access, peer-reviewed journal that features works of exceptional significance in all areas of biological science, from molecules to …
biology.plosjournals.org/