Invertebrates are animals that lack a vertebral column, or backbone, and millipedes, spiders and other invertebrates are probably taken as well. Given these facts, millipedes lack what among the following options:
- epidermal
 - segmented body
 - leg pairs
 - a cuticle
 - a vertebral column
 - diplosomites
 - Chlorophyll
 - biological diversity


 

     a vertebral column    