Related Clues:

• ''___ and Nothingness'' (Sartre)
• Real low life?
• Simple life
• Some real thing
• Bit of marine life
• Single-celled protozoan
• "Black Lagoon" menace of film
• Simple lab specimen
• Single-celled organism (Var.)
• Doubler in division
• Independent being
• It divides to multiply
• Human __
• It's alive
• Sum of all parts