References
Every course here is written against a named anchor text — one standard work whose terminology and topic boundaries the course follows — and checked against a secondary witness written independently of it. Where the two disagree, the course follows the anchor and says so at the entry where the disagreement lands. These are the texts for Biology.
- Anchor
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OpenStax, Biology 2e (Clark, Douglas & Choi). Pinned to the live web edition revised July 22, 2026. Eight units, 47 chapters.
- Secondary witness
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General Biology, Boundless / Lumen Learning, hosted on LibreTexts. Independently authored and not derived from OpenStax.
Naming the anchor is not a claim of endorsement by its publisher, and the course is not affiliated with any of the works above. Openly licensed texts carry their licence beside them; the rest are cited, not reproduced.