Give three major differences between chordates and non-chordates and draw the sketch of a chordate's body showing those features.

Explanation

The major differences between chordates and non-chordates.
`{:("Chordates","Non-chordates"),("1. Notochord is present.","1. Notochord is absent."),("2. Central nervous system is dorsal hollow,","2. Central nervous system is ventral,"),("single and non-ganglionated.","solid, double and ganglionated."),("3. Pharynx is perforated by gill slits.","3. Gill slits are absent."),("4. Heart is ventral.","4. Heart is dorsal (if present)."),("5. A post-anal tail is present.","5. Post-anal tail is absent."):}`