Possible Clues:

• Simplest form of life in zoo or apt compound
• Unicellular organisms, the simplest animals
• Microscope blobs
• Single-celled organisms
• Unicellular creatures
• Amoebas, e.g
• Informal term for single-cell eukaryotes
• Low life supporting short amphibian carrying little weight
• Unicellar organisms, the lowest animals
• Single-celled animals