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Notochord

Which one of ...

Question

Which one of the following statements is NOT correct about the occurrence of notochord?

A

Branchiostoma has notochord throughout its life.

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B

Present only in larval stage in Phylum Chordata.

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C

It is replaced by vertebral column in adult vertebrates.

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D

In humans it is absent throughout the life.

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Solution

The correct option is D
In humans it is absent throughout the life.

In humans, the notochord is present in the embryonic stage and is replaced by the vertebral column later on.

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Similar questions

Q. Read the following statements.

(a) Three subphyla of phylum Chordata are Tunicata, Cephalochordata and Vertebrata.
(b) In Ascidia, notochord is present only in larval tail.
(c) Notochord persists throughout life in all vertebrates.
(d) Nerve cord is ventral, solid and double in chordates.

Choose the option with only incorrect statements.

Q. Statement 1: Cephalochordata bears notochord all along the body throughout life.
Statement 2: Urochordate bears vertebral columns only in the tail region throughout life.
Which of the statement(s) is/are correct?

Q. Which of the given option is correct regarding the statments?
Statement I : Cephalochordata bears notochord all along the body throughout life.
Statements II: Urochordate bears vertebral column only in tail region throughout the life.

Q. In which of the following notochord is replaced by bony vertebral column in adult?

Q. In _______, notochord is present only in larval tail while in ________, it extends from head to tail region and is persistent throughout their life.

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