Related Clues:

• Small pond dwellers (Var.)
• Ones with pseudopods
• They multiply by dividing
• They're seen on slides
• Tiny pond denizens
• Pond critters (Var.)
• Simple life forms
• Microscope slide viewings
• Protozoas
• One-celled critters
• They're often seen on slides
• One-celled pond dwellers