Phyllum- Chordata|Difference Between Chordates And Non Chordates|Classification

Chordates process

Prochordata|Chordates|Classification|Vertebrata

Which one is a link between chordates and nonchordates?

Give three major differences between chordates and non chordates and draw a schematic sketch of a chordate showing those features.

Connecting link between chordates and non-chordates is