Question

Choose the correct answers from the alternatives given.
Sharks and bony fish are different in that only:
(A) bony fish have paired fins
(B) bony fish have an operculum
(C) sharks have a bony skeleton
(D) sharks are predaceous

Answer 1

Hint: The fish grouping is mainly categorized into two broad types, sharks and bony fishes. Sharks have been identified with a specified cartilaginous skeleton, whereas the bony fishes are identified with a bony fold on the skin over their gills called an operculum.

Complete answer:
The bony fish exhibits a distinct skeleton made up of calciferous bones. They belong to Osteichthyes class, whereas the sharks belong to Chondrichthyes class. The operculum is a hard, plate-like, bony flap that covers the gills of a bony fish (superclass: Osteichthyes). The operculum present in the bony fishes helps them to protect their gills. The opening and closing of the operculum helps the bony fishes to respire at that time when they do not swim. The bony fishes have scales over their skin, and most of these species exhibit a fusiform body structure. The skeleton pattern assists to differentiate amongst the cartilaginous (sharks) and bony wishes. In simple words the sharks, being the cartilaginous fishes, have a skeleton formed of cartilages, whereas the bony fishes have a skeleton formed of bones.
The operculum is a sequence of bones that is present in the bony fish aids as a makeover backing structure and a defensive casing over gills. The operculum also assists the bony fishes to respire and feed. Fishes can attain dissolved oxygen by propelling water through their gills by randomly opening and closing their operculum and jaws.

Note: The bony fishes are further categorized as lobe-finned and ray-finned. The bony fishes are mostly considered by the presence of operculum, lungs or swim bladders, and bones casing the head.

Hence the correct answer is option(B)