Related Clues:

• Specimens on microscope slides
• Jellylike blobs
• Slide viewings, perhaps
• One-celled organisms
• Small pond dwellers (Var.)
• Ones with pseudopods
• They multiply by dividing
• They're seen on slides
• Tiny pond denizens
• Pond critters (Var.)
• Shape shifters?
• One-cell creatures
• Microscopic shape-shifters
• Protean ones
• They're often under the microscope