First slide

Basis of Classification

Question

Which of the following is correct about notochord?

Easy

A

It is ventrally located.
B

It is ectodermal in origin.
C

It is formed in the embryonic stage in all chordates.
D

It is located dorsal to the nerve cord.

Solution

Notochord is a mesodermally derived rod-like structure formed on the dorsal side during embryonic development in all chordates (It is replaced by a vertebral column in vertebrates). It lies between the alimentary canal and the nerve cord (ventral to the nerve cord).

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