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Question

Distinguish between cartilagenous fishes and bony fishes.


Solution

 Cartilaginous Fishes Bony Fishes
Classified under the class ChondrichthyesClassified under the class Osteichthyes
The skeleton is made up of cartilageThe skeleton is made up of bones
They show marine habitatThey show both the marine and freshwater habitat
Gills are not covered with an operculum Gills are covered with an operculum
RBCs are formed in spleen and thymusRBCs are formed in the red bone marrow
The swim-bladder is absent, have to swim continuously to prevent sinkingThe swim bladder is present that maintains the buoyancy
For examples, include Labeo, Rohu etc.For example, include sharks, rays eyc.

Biology

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