What is three things all chordates have in common besides a back bone what do beside backbone?

Three things all chordates have in common besides a backbone are:

1. Notochord: Chordates have a notochord, which is a flexible rod-like structure that runs along the dorsal side of the body. The notochord provides support and helps the animal to move.

2. Dorsal Nerve Cord: Chordates have a dorsal nerve cord, which is a bundle of nerves that runs along the dorsal side of the body. The dorsal nerve cord is responsible for coordinating the animal's movements and sensory responses.

3. Pharyngeal Slits or Clefts: During their development, all chordates have pharyngeal slits or clefts, which are openings in the pharynx that connect the pharynx to the outside environment.