You are presented with the question "where does a range of reproductive systems occur?" and the following answer choices: 
- exoskeletons
 - Plant reproduction
 - h2o
 - shrub beds
 - within roundworms
 - clouds
 - Most plants
 - gastropod shells

Now knowing that roundworms make up the phylum Nematoda and within the Nematoda, a range of reproductive systems occur, choose the best answer.


 

     within roundworms    