| All Institutions: Biological Sciences | |||||
| Institution Name | Weighted Rank: 1971-1980 | Weighted Rank: 1976-1985 | Weighted Rank: 1981-1990 | Weighted Rank: 1986-1995 | Weighted Rank: 1991-2000 |
| Reed College | 4 | 5 | 5 | 2 | 1 |
| California Institute of Technology | 1 | 2 | 1 | 3 | 2 |
| Swarthmore College | 7 | 9 | 10 | 5 | 3 |
| University of Chicago | 3 | 4 | 4 | 4 | 4 |
| Kalamazoo College | 39 | 20 | 13 | 9 | 5 |
| Massachusetts Institute of Technology | 15 | 12 | 12 | 11 | 6 |
| Johns Hopkins University | 20 | 11 | 6 | 8 | 7 |
| Earlham College | 9 | 15 | 28 | 13 | 8 |
| Harvey Mudd College | 12 | 16 | 59 | 27 | 9 |
| College of the Atlantic | 1 | 10 | |||
| Grinnell College | 29 | 14 | 15 | 23 | 13 |
| Oberlin College | 32 | 25 | 20 | 24 | 21 |
| Wabash College | 16 | 22 | 16 | 17 | 34 |
| Macalester College | 103 | 60 | 48 | 62 | 74 |
| Ohio Wesleyan University | 181 | 107 | 106 | 119 | 97 |
| College of Wooster, The | 41 | 86 | 82 | 90 | 107 |
| Hope College | 56 | 93 | 78 | 72 | 122 |
| Kenyon College | 59 | 82 | 88 | 91 | 145 |
| Albion College | 66 | 110 | 166 | 206 | 157 |
| Antioch University, All Campuses | 52 | 148 | 162 | 192 | 196 |
| DePauw University | 141 | 88 | 138 | 286 | 230 |
| Denison University | 157 | 130 | 167 | 336 | 375 |