difference between chordates and non chordates

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Solution

Chordata Non Chordata

1. Notochord is present at least in some stage of life cycle 1. Notochord is absent

2. Pharyngeal gill slits are present 2. Pharyngeal gill slits absent

3. Nerve cord is non-ganglionated, single, dorsal and hollow 3. Nerve cord is ganglionated, double ventral and solid

4. A post anal tail is present in some stages or throughout life 4. Post anal tail is absent

5. Ventral heart is present 5. Dorsal heart is present

6. Haemoglobin is present in RBC 6. Haemoglobin when present is in the blood plasma

7. Endoskeleton and exoskeleton are present 7. Generally exoskeleton alone is present

8. Hepatic portal system is present 8. Hepatic portal system absent

9. Blood flow is forward in ventral vessel and backward in dorsal vessel 9. Blood flow is backward in ventral vessel and forward in dorsal vessel

10. Eyes are derived from brain 10. Eyes are derived from the skin

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