Q.

Notochord is confined only to larval tail in

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a

Amphioxus

b

Dentalium

c

Myxine

d

Doliolum

answer is D.

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Detailed Solution

Notochord is confined to larval tail in Doliolum, which is an urochordate.Amphioxus is a cephalochordate in which notochord is persistent throughout the life.Dentalium (Mollusca) is without a notochord.Myxine (Cyclostome) has cartilaginous endoskeleton with a persistent notochord.
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