Related Clues:

• One-celled protozoan (Var.)
• Slide subject
• 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