Biology practice from the cell up — organelles and membranes, DNA and Mendelian genetics, evolution and natural selection, human physiology (circulatory, respiratory, nervous, immune), ecology and energy flow, and molecular biology (transcription, translation, respiration, photosynthesis). Difficulty scales from everyday facts to the named experiments and mechanisms behind the science, with a teaching explanation after every answer. Aligned to high-school/AP Biology, GED Science, and the biology on the MCAT.
• Meets you at your level — never too easy, never too hard.
• Adapts every question to how you’re doing.
• Tracks your level over time. Skill practice, not a test.
All exam, test, and product names and trademarks are the property of their respective owners and are used here for identification and reference only. Keentune is independent study practice — not affiliated with, authorized, or endorsed by any of these organizations.