Identify the vertebrate group of animals characterized by the presence of 4 pairs of gills.
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a
Amphibia
b
Chondrichthyes
c
Osteichthyes
d
Reptilia
answer is C.
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Detailed Solution
In Osteichthyes 4 pairs of gills are present for the respiration. In Chondrichthyes 5 pairs of gills are present. In Amphibia gills are present only in larval forms. In Reptiles gills are absent.