Differentiate between: Notochord and Nerve cord.
(N/A)
| Notochord | Nerve cord |
|---|---|
| $(1)$ It is a mesodermally derived rod-like structure formed on the dorsal side during embryonic development in some animals. | $(1)$ It is an ectodermally derived structure,present on the dorsal or ventral side in all animals. |
| $(2)$ It may exist throughout life,only during embryonic stages,or may be replaced by the vertebral column. | $(2)$ It remains present throughout the life of the animal. |
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Reason: Notochord is replaced by the vertebral column in the adult vertebrate.
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