Related Clues:
- Tiny organism (Var.)
- One-celled protozoan (Var.)
- Organism on a slide
- Unicellular critter
- Study in multiplication and division?
- Minuscule creature
- It doubles in division
- Biology 101 protozoan
- Microscopist's sighting (Var.)
- Amorphous organism
- Lab-slide subject
- Simple animal
- Bio 101 subject (Var.)
- One-celled organism (Var.)
- Tiny blob