You are presented with the question "something what to cilia help prokaryotes move." and the following answer choices: 
- it needs them
 - Chemical energy
 - similar in structure
 - It helps them survive
 - it keeps an organism warm
 - major threat to health
 - An object is seen
 - The bending of a ray of light

Now knowing that flagella help prokaryotes move and flagella and cilia are similar in structure, choose the best answer.


 

   similar in structure      