Related Clues:
- Tiny organism (Var.)
- One-celled protozoan (Var.)
- Lake organism
- Slide subject
- Bit of ocean life
- Primitive plant
- Simple aquatic organism
- Organism on a slide
- Birdbath organism
- Unicellular critter
- Fish tank organism
- Study in multiplication and division?
- Kelp, for one
- Minuscule creature
- It doubles in division