Pharynx is perforated by gill-slits in

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catfish and cuttlefish

angelfish and devilfish

sawfish and starfish

hagfish and dogfish

answer is D.

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Detailed Solution

Pharyngeal gill-slits are characteristically found in chordates. Hagfish (Myxine) and dogfish (Scoliodon) are chordates. Angelfish (Pterophyllum), catfish (Clarias), and sawfish (Pristis) are also chordates and possess pharyngeal gill-slits. Devilfish (Octopus), cuttlefish (Sepia), and starfish (Asterias) are nonchordates and lack pharyngeal gill-slits.

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Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE