A) notochord
B) dorsal tubular nerve chord
C) pharyngeal gill cleft
D) absence of hepatic portal system
Correct Answer: D
Solution :
Presence of hepatic portal system is a character of chordates:| S. No. | Chordata | Non -chordata |
| 1. | Post anal tail is usually present. | Usually absent. |
| 2. | Notochord present at some stage or replaced by a back bone. | Notochord or back bone absent |
| 3. | Pharyngeal gill slits present at some stage of life | These are usually absent |
| 4. | Heart ventrally placed | Dorsal, lateral, or absent |
| 5. | Closed blood vascular system | Open, closed or absent |
| 6. | Hepatic portal system present | Absent |
| 7. | Hemoglobin in RBCs | Hemoglobin in plasma or absent |
| 8. | Hollow nervous system | Solid nervous system |
| 9. | Single, dorsal nerve cord without ganglia | Double, ventral nerve cord bearing ganglia. |
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