NEET Biology question

Which one of the following statements is incorrect about the occurrence of notochord?

(A)It is present only in a larval tail in ascidian.
(B)It is replaced by a vertebral column in adult frog.
(C)It is absent throughout life in humans from the very beginning.Correct
(D)It is present throughout life in Amphioxus.

Answer: (C)

Solution

In ascidians (urochordates), the notochord is confined to the larval tail and is lost at metamorphosis, so (a) is a correct statement. In the adult frog, the notochord is replaced by a vertebral column, so (b) is correct. In Amphioxus, the notochord persists throughout life, so (d) is correct. In humans, however, the

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Question ID VK-106847