Question

In which of the following the notochord is present in embryonic stage [CBSE PMT 2002]
A) Vertebrates
B) Some chordates
C) All chordates
D) Non-chordates

Answer 1

All chordates
➡️ notochord is present in embryonic stage

Answer 2

The notochord is present in embryonic stage in all chordatas.

Option c

Explanation:

• the notochord is a special developmental structure which is present in the posterior part of the the hemichordata and the chordata in some phase of their life cycle.

• However in case of the hemichordata the the notochord is is not fully developed but in case of the the auditor the notochord is very well developed.

• In case of the tunicata which falls under the hemichordata the notochord is found only in the tail region.

To know more about notochord,

Mention the function and location of notochord.

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