All of the following groups have members with an operculum, except one. Select the exception.
a. Holocephali
b. Elasmobranchii
c. Sarcopterygii
d. Actinopterygii
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Answer:
holocephali
Explanation:
the fishesh on the basis of their structure and composition of the skeleton is divided into cartilaginous fishes and Bony fishes the cartilaginous fishes possesses gill slits and gills open directlyto the exterior in Bony fishes operculum is a series of Bony structure that covers the gills it is used for respiration and feeding.
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