| Bacterium |
| Breather? |
| Oxygen user |
| Living thing |
| Microorganism |
| It needs oxygen |
| Oxygen consumer |
| Bit of bacterium |
| Oxygen bacterium |
| Any living entity |
| Bacterial organism |
| Mycobacterium, e.g. |
| Entity needing oxygen |
| Oxygen-using organism |
| Oxygen-loving organism |
| Bacteriologist's study |
| Microscopic oxygen user |
| Oxygen-needing organism |
| Oxygen-reliant organism |
| Organism needing oxygen |
| Oxygen-needing bacterium |
| Bacterium needing oxygen |
| Oxygen-thriving organism |
| Oxygen-consuming organism |
| Oxygen-dependent creature |
| Bacteria requiring oxygen |
| Oxygen-dependent organism |
| Oxygen-utilizing bacterium |
| Bacterium requiring oxygen |
| Oxygen-consuming bacterium |
| Oxygen-dependent bacterium |
| Listeria bacterium, for one |
| Bacterium that needs oxygen |
| Organism needing air to exist |
| Oxygen-requiring microorganism |
| Bacterium requiring oxygen, e.g. |
| Sound of a willow in the wind |
| Member of a culture requiring oxygen |