First slide

Classification of Animals

Question

Gill-slits are present but notochord is absent in

Moderate

A

Urochordata
B

Cephalochordata
C

Hemichordata
D

Echinodermata

Solution

Hemichordates have gill-slits but do not possess a notochord. They are half-chordates that form a connecting link between nonchordates and chordates.

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