Vertebrate chordates have a backbone, and strength correlates with our spinal cord and our nerves, our backbone. Given these facts, what do vertebrate chordates have among 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      