The following statement are associated with the occurrence of notochord. Identify the incorrect statement.

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It is present throughout life in Amphioxus.

It is present only in larval tail in ascidians.

It is absent throughout the life in humans from the very beginning.

It is replaced by a vertebral column in adult frog.

answer is C.

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Detailed Solution

Notochord is a flexible rod like structure that forms the main support of the body in the lowest chordates. Notochord is present in embryonic stage and gets replaced by vertebral column in the adult humans.

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