Which is incorrect about non-chordates?

What are non-chordates ?

Which one of the following feature is found in chordates but not in non-chordates

Write differences between chordates and non-chordates.

How are chordates different from non-chordates on the basis of heart?

How are chordates different from non-chordates on the basis of heart?

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