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Q.

The notochord is persistent throughout life in which of the following?

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a

Carcharodon

b

Hippocampus

c

Exocoetus

d

Clarias

answer is D.

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Detailed Solution

Notochord is persistent throughout life in Carcharadon (Chondrichthyes - Cartilaginous fishes).

Exocoetus (Flying fish), Hippocampus (Sea horse), Clarias (Magur) are the examples of class Osteichthyes (Bony fishes). In these, the notochord is found in embryonic stage only.

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