Question
Distinguish between Nonchordata and Chordata.
Distinguish between Nonchordata and Chordata.
Nonchordates | Chordates | |
i. | Notochord is absent in them. | Notochord is present in them at some of their developmental stage. |
ii. | Their central nervous system is solid and ventral. | Their central nervous system is hollow and dorsal. |
iii. | Their circulatory system is of open or closed type. | Their circulatory system is of closed type. |
iv. | Heart, if present in them, is dorsal in position. | Heart is always present and is ventral in position. |
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