Tracks
| # | Title | Sung by | |
|---|---|---|---|
| 1 | Biology | Nadine Coyle, Cheryl Cole, Nicola Roberts, Kimberley Walsh, Sarah Harding | 3:34 |
| 2 | Nobody but You | Girls Aloud | 4:10 |
| 3 | Biology (Tony Lamezma remix) | Girls Aloud | 5:15 |
| 4 | Biology (video) | Girls Aloud | 3:34 |
| 5 | Biology (karaoke video version) | Girls Aloud | 3:34 |
| 6 | Biology (game) | Girls Aloud |
Member reviews
Source: MusicBrainz release group 6b196e88-85be-3697-9b40-6fc474b3ec6f (CC0). Cover: Cover Art Archive.