Q.
In bony fishes, how many pairs of gills are present?
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a
6-15
b
4-15
c
4
d
6
answer is C.
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Detailed Solution
In Osteichthyes, 4 pairs of gills are present.6-15 pairs of gill-slits are found in cyclostomes.In Chondrichthyes 5-7 pairs (usually 5 pairs) of gill-slits are present.
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