Give the points of differences between non-chordates and chordates.

(N/A)

Non-chordates	Chordates
$(i)$ Notochord is absent.	$(i)$ Notochord is present.
$(ii)$ Central nervous system is solid and ventral.	$(ii)$ Central nervous system is hollow and dorsal.
$(iii)$ Pharyngeal gill slits are absent.	$(iii)$ Pharyngeal gill slits are present.
$(iv)$ Heart,if present,is dorsal.	$(iv)$ Heart is ventral.
$(v)$ Post-anal tail is absent.	$(v)$ Post-anal tail is present.

Detailed explanation:
$1$. In non-chordates,the notochord is completely absent throughout their life cycle.
$2$. The central nervous system in non-chordates is solid and located ventrally,whereas in chordates,it is hollow and located dorsally.
$3$. Chordates possess pharyngeal gill slits at some stage of their development,which are absent in non-chordates.
$4$. The heart in non-chordates is typically dorsal,while in chordates,it is located ventrally.
$5$. $A$ post-anal tail is a characteristic feature of chordates,which is absent in non-chordates.