- - One-celled organisms
- - One-celled creatures
- - One-celled animals
- - One-celled swimmers
- - Single-celled protozoa
- - Single-celled animals
- - Protozoa
- - Plural form of amoeba
- - Pseudopods move them
- - protozoans of ever-changing shape
- - Second US president back in A&E — cause of dysentery?
- - Creatures named for their changing shape
- - Simple animals
- - They're often under the microscope
- - Shape-shifting creatures
- - Microscopic shape-shifters
- - Microbes
- - Microscopic creatures
- - Protozoans
- - Movers on a slide
- - Slide organisms
- - Amorphous creatures
- - Perhaps pond-life seem to incite pub brouhaha, all ending in casualty
- - Living blobs
- - Tiny dividers
- - Slide creatures
- - Tiny shape-shifters
- - Bio 101 studies
- - Ones moving with the aid of pseudopods
- - Frequent 'Far Side' figures
- - They multiply with division
- - Shape shifters?
- - Sights on slides
- - Little blobs on slides
- - Unicellular swimmers
- - Shapeless blobs
- - Protean ones
- - They haven't any definite forms
- - They're often seen on slides
- - Microscope-slide organisms
- - Pseudopod formers
- - Microscope slide subjects
- - Low life forms
- - Minute animals
- - Simplest form of animal life.
- - Unicellular animals.
- - Rudimentary forms of life.
- - Biology lab topics
- - Tiny animals.
- - Simple life?
- - Low life
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