Answer the following question given this paragraph: 

Some bacteria also have tail-like structures called flagella ( Figure below ). Flagella help bacteria move. As the flagella rotate, they spin the bacteria and propel them forward. Though some eukaryotic cells do have a flagella, a flagella in eukaryotes is rare.


Q: Some bacteria also have tail-like structures called what?

 Choices:

- plasmids

- sporangia

- nuclei

- flagella

A:
flagella
