You are presented with the question "What converts nitrogen for flowers?" and the following answer choices: 
- Enzymes
 - bees
 - eukyarotes
 - heterotrophs
 - mitosis
 - Echinoids
 - bacteria
 - Roundworms.

Now knowing that bacteria in soil convert atmospheric nitrogen into a form usable by plants and many plants produce flowers, choose the best answer.


 

       bacteria  