alleryA circular jawless mouth, 6–15 pairs of gill slits and no paired fins identify:
ACyclostomata
BChondrichthyes
COsteichthyes
DAmphibia
Answer & Solution
Correct answer: A. Cyclostomata
Cyclostomes have a circular sucking mouth without jaws, 6–15 pairs of gill slits, and no scales or paired fins. Their cranium and vertebral column are cartilaginous.
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