Fact 1: Vertebrate chordates have a backbone.

Fact 2: Jaws appear within the vertebrates.

Given the two facts above, answer the question "What characteristics do chordates have? " with the following options: 
- arthropods
 - aerobic capacity
 - annelids
 - protozoa
 - Veins and arteries.
 - backbone and jaw
 - sensory neurons
 - four limbs


 

      backbone and jaw   