Answer:
Complete body cavity, segmentation, and bilateral symmetry
Step-by-step explanation:
In conjuction with possessing a backbone, chordates also have a complete body cavity, segmentation, and bilateral symmetry. They possess a complete true body cavity called the coelom. They also exhibit heteromeric segmentation wherein the links between segmented regions are inconspicuous. And they majorly possess bilateral symmetry; being divisible into symmetric halves.