Which of the following is correct about notochord?
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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.
answer is C.
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Detailed 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).