Fact 1: Vertebrate chordates have a backbone.

Fact 2: Strength correlates with our spinal cord and our nerves, our backbone.

Given the two facts above, answer the question "What do vertebrate chordates have?" with the following options: 
- aerobic capacity
 - primitive structures
 - a spinal cord and nerves
 - invertebrate structures
 - Veins and arteries.
 - cell walls
 - characteristics
 - principals of aerodynamics


 

   a spinal cord and nerves      