Related Clues:

• Protean ones
• Biology class topic
• Cell on a slide
• Famed West Coast music chain
• Paramecium's kin
• Slide sight
• Single-cell organism
• They're often under the microscope
• Blob on a slide
• Unicellular swimmers
• Creature on a slide
• Shapeless blobs
• 'The Far Side' critter
• "The Far Side" critter
• Slide presentation