| One who studies minute organisms |
| Microorganisms |
| All organisms in one area, collectively |
| A studier of living organisms |
| Living organisms |
| Genetically related organisms |
| Group of genetically similar organisms |
| Like some single-celled organisms |
| Group of organisms |
| Useful microorganisms |
| Bottom-of-the-food-chain organisms |
| Simple aquatic organisms |
| Microorganisms in bread |
| Modified organisms |
| Like all living organisms |
| Aquatic organisms |
| Of the study of microorganisms |
| Aquarium microorganisms |
| Ship-fouling organisms, on Talk Like a Pirate Day? |
| Full of microorganisms |
| Worrisome microorganisms, for some |
| Study of organisms and their habitats (abbr.) |
| One-celled microorganisms |
| Organisms that need oxygen |
| Like some basic organisms |
| Photosynthetic plants |
| Sans living organisms |
| Study of organisms and habitats |
| One-celled organisms |
| Danger to animals or the environment from living organisms |