| Answer | Crossword Clue |
|---|---|
| AEROBE | It needs oxygen |
| AEROBE | Bacterium that needs oxygen |
| AERATOR | It adds oxygen |
| ANAEROBE | It doesn't need oxygen |
| GILL | It obtains oxygen from water |
| AIR | It consists of nitrogen, oxygen, etc. |
| ANAEROBE | It requires no oxygen for growth |
| TENT | It might be filled with oxygen |
