Fact 1: Most protists have motility.

Fact 2: Motilities are full and smooth.

Given the two facts above, answer the question "what are full and smooth?" with the following options: 
- porcupines
 - a cuticle
 - sandpaper
 - tree bark
 - fertile
 - protist
 - kalenchoes
 - alveoli


 

      protist   