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Biology

Explore life in all its forms: from cells and DNA to ecosystems and biodiversity.

28 free sites · 26 in English.

1. Khan Academy – Biology English khanacademy.org

   General biology with videos and exercises.

   For: Middle & high schoolCollege

2. OpenStax – Biology 2e English openstax.org

   Free college textbook.

   For: College

3. OpenStax – Anatomy and Physiology 2e English openstax.org

   Free textbook on the human body.

   For: College

4. HHMI BioInteractive English biointeractive.org

   Videos, animations and classroom activities.

   For: Middle & high schoolCollege

5. Learn.Genetics (University of Utah) English learn.genetics.utah.edu

   Interactive genetics, cells and neuroscience.

   For: Middle & high schoolGeneral public

6. DNA Learning Center (Cold Spring Harbor) English dnalc.cshl.edu

   Animations and resources on DNA and genetics.

   For: Middle & high schoolCollege

7. Cells Alive English cellsalive.com

   Interactive models of cells and microbes.

   For: Middle & high school

8. LibreTexts – Biology English bio.libretexts.org

   Open biology library.

   For: College

9. NCBI Bookshelf English ncbi.nlm.nih.gov

   Free biology and medicine books.

   For: College

10. NHGRI – Talking Glossary of Genomic Terms English genome.gov

    Genetics terms explained with illustrations.

    For: Middle & high schoolCollege

11. MedlinePlus English medlineplus.gov

    Health and the human body, from the U.S. National Library of Medicine.

    For: Middle & high schoolCollege

12. The Biology Corner English biologycorner.com

    Free worksheets, labs and lessons.

    For: Middle & high school

13. MIT OCW – 7.01 Fundamentals of Biology English ocw.mit.edu

    Complete MIT course.

    For: College

14. Amoeba Sisters (YouTube) English youtube.com

    Short animated biology videos.

    For: Middle & high school

15. Bozeman Science English bozemanscience.com

    Hundreds of biology and AP science lessons.

    For: Middle & high school

16. Crash Course (YouTube) English youtube.com

    Biology, anatomy and ecology series.

    For: Middle & high schoolGeneral public

17. Smithsonian – Natural History English naturalhistory.si.edu

    Collections and research from the National Museum of Natural History.

    For: Middle & high schoolCollege

18. Tree of Life Web Project English tolweb.org

    The tree of life and evolution.

    For: Middle & high schoolCollege

19. iNaturalist Multilingual inaturalist.org

    Identify plants and animals and contribute to science.

    For: Middle & high schoolCollege

20. Encyclopedia of Life Multilingual eol.org

    Information on millions of species.

    For: Middle & high schoolCollege

21. OpenStax – Concepts of Biology English openstax.org

    Free introductory textbook.

    For: Middle & high schoolCollege

22. OpenStax – Microbiology English openstax.org

    Free microbiology textbook.

    For: College

23. Understanding Evolution (UC Berkeley) English evolution.berkeley.edu

    A free guide to evolution.

    For: Middle & high schoolCollege

24. Nature Scitable English nature.com

    Free genetics and cell biology library.

    For: Middle & high schoolCollege

25. iBiology English ibiology.org

    Free talks by leading biologists.

    For: Middle & high schoolCollege

26. PDB-101 English pdb101.rcsb.org

    Learn about protein structures.

    For: Middle & high schoolCollege

27. Rosalind English rosalind.info

    Learn bioinformatics by solving problems.

    For: College

28. Open Yale – Principles of Evolution, Ecology and Behavior English oyc.yale.edu

    Yale video course.

    For: CollegeGeneral public