Fact 1: Cells are organized into tissues, and tissues form organs.

Fact 2: Bacteria are one-celled organisms.

Given the two facts above, answer the question "what only have one cell and no tissue?" with the following options: 
- ferns
 - Most plants
 - mice
 - bacteria
 - frogs
 - Conifers
 - cell wall
 - fungi


 

    bacteria     