You are presented with the question "What do vertebrate chordates have?" and the following answer choices: 
- aerobic capacity
 - primitive structures
 - a spinal cord and nerves
 - invertebrate structures
 - Veins and arteries.
 - cell walls
 - characteristics
 - principals of aerodynamics

Now knowing that vertebrate chordates have a backbone and strength correlates with our spinal cord and our nerves, our backbone, choose the best answer.


 

   a spinal cord and nerves      