First slide

Classification of Animals

Question

Which of the following statement about notochord is wrong?

Moderate

A

It persists throughout life in Branchiostoma.
B

It is present only in larval tail in Ascidia.
C

It is present in the embryonic period in Hippocampus.
D

It is totally replaced by vertebral column in Scoliodon.

Solution

Scoliodon is a cartilaginous fish. Notochord is persistent and is not completely replaced by the vertebral column.

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