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Regarding Osteichthyes : 1. They have three pairs of gills 2. Gills are covered by an operculum on each side. Regarding 1 and 2:

( a ) 1 is correct but 2 is incorrect
( b ) 1 is incorrect but 2 is correct
( c ) Both are correct
( d ) Both are incorrect
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(B) is the right answer.

Class – Osteichthyes : They have four pairs of gills which are covered by an operculum on each side.
answered Jan 3, 2014 by pady_1

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