Hardest BIOL classes at OU

Ranked by average GPA from official grade distributions. Only courses with at least 100 graded students.

1. BIOL 3214: Comparative Vertebrate Anatomy Average GPA 2.33, 110 students
2. BIOL 2255: Human Anatomy Average GPA 2.53, 4,963 students
3. BIOL 2124: Human Physiology Average GPA 2.59, 1,578 students
4. BIOL 1134: Evolution/ecology/diversity Average GPA 2.78, 2,117 students
5. BIOL 1124: Intro Biol: Molecule/cell/phys Average GPA 2.81, 6,652 students
6. BIOL 3103: Principles of Physiology Average GPA 2.90, 971 students
7. BIOL 3113: Cell Biology Average GPA 2.92, 2,508 students
8. BIOL 3333: Genetics Average GPA 2.93, 9,320 students
9. BIOL 1013: Introduction to Biology Average GPA 2.97, 556 students
10. BIOL 2234: Introduction to Human Anatomy Average GPA 2.99, 301 students
11. BIOL 2913: Intro to Quantitative Biology Average GPA 3.01, 396 students
12. BIOL 3833: Introduction to Neurobiology Average GPA 3.14, 330 students
13. BIOL 4843: Molecular Biology Average GPA 3.15, 882 students
14. BIOL 3013: Evolution Average GPA 3.16, 1,134 students
15. BIOL 1003: Contemp Issues in Biology Average GPA 3.23, 565 students
16. BIOL 1005: Concepts in Biology Average GPA 3.43, 179 students
17. BIOL 3403: Principles of Ecology Average GPA 3.46, 448 students
18. BIOL 3073: Medical Entomology Average GPA 3.48, 121 students
19. BIOL 3203: Animal Development Average GPA 3.54, 159 students
20. BIOL 3563: Biological Conservation Average GPA 3.59, 190 students
21. BIOL 4653: Parasitology Average GPA 3.63, 211 students
22. BIOL 5923: Programming in R for Biology Average GPA 3.64, 152 students
23. BIOL 4044: Ornithology Average GPA 3.65, 100 students
24. BIOL 3463: Water and Ecol Sustainability Average GPA 3.68, 230 students
25. BIOL 4083: Herpetology Average GPA 3.68, 113 students
26. BIOL 4233: Neurobiology of Disease Average GPA 3.69, 117 students
27. BIOL 4970: Behavioral Ecology Average GPA 3.73, 255 students
28. BIOL 3342: Genetics Laboratory Average GPA 3.74, 674 students
29. BIOL 3101: Principles of Physiology Lab Average GPA 3.75, 2,385 students
30. BIOL 4063: Field Herpetology Average GPA 3.80, 126 students
31. BIOL 3083: Animal Behavior Average GPA 3.88, 307 students
32. BIOL 4983: Senior Seminar Average GPA 3.90, 605 students
33. BIOL 5970: Behavioral Ecology Average GPA 3.92, 116 students
34. BIOL 3980: Honors Research (honors) Average GPA 3.94, 158 students

See also: Easiest classes, OU course catalog, BIOL course catalog.