Question

Differentiate between chordates and non chordates?

Answer 1

Chordates : 1. A notochord is present at some stage in the life of a chordate.
2. Central nervous system is dorsal and hollow.
3. Gill slits are present in the pharynx either in the embryo or adult.
4. Tail is present at some stage in the life of the chordate.
5. Heart is ventral.
6. If present RBCs contain respiratory pigment (haemoglobin).
Non chordates : 1. Notochord is not present at any stage in the life of a non-chordate.
2. Central nervous system is ventral and solid.
3. Gill slits are absent.
4. Tail is absent.
5. Heart is dorsal (if present).
6. If haemoglobin or other respiratory pigment is present, it is found in the blood plasma. RBCs are absent.

** Hope this helps you **

Answer 2

Differentiate between chordates and non chordates?

Answer

CHORDATES

=> Notochord present

=> central nervous system is dorsal .

=> hollow and single

=> pharynx perforated by Gill slits

=> heart is ventral

=> tail is present

NON CHORDATES

=> Notochord absent

=> central nervous system is ventral

=> solid and double

=> Gill slits are absent

=> heart is dorsal

=> tail is absent