You are presented with the question "Millipedes lack what?" and the following answer choices: 
- epidermal
 - segmented body
 - leg pairs
 - a cuticle
 - a vertebral column
 - diplosomites
 - Chlorophyll
 - biological diversity

Now knowing that invertebrates are animals that lack a vertebral column, or backbone and millipedes, spiders and other invertebrates are probably taken as well, choose the best answer.


 

     a vertebral column    