Fact 1: Cells are organized into tissues, and tissues form organs. Fact 2: Bacteria are one-celled organisms. Given the two facts above, what only have one cell and no tissue?

Select from the following.
[1]. ferns.
[2]. Most plants.
[3]. mice.
[4]. bacteria.
[5]. frogs.
[6]. Conifers.
[7]. cell wall.
[8]. fungi.
The answer is:
[4].