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Question

Consider the following features:
(a) Streamlined body
(b) Presence of operculum
(c) Presence of air bladder
(d) Ectothermy
Organism exhibiting above features belongs to taxon Pisces which includes organisms like

A
Petromyzon
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B
Pristis
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C
Myxine
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D
Labeo
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Solution

The correct option is D Labeo
Class Osteichthyes: It includes both marine and fresh water fishes with bonyendo skeleton. Their body is streamlined. They have four pairs of gills which are covered by an operculum on each side. Skin is covered with cycloid/ctenoid scales. Air bladder is present which regulates buoyancy. Heart is two chambered (one auricle and one ventricle). They are cold-blooded animals (ectotherm). Sexes are separate. Examples: Exocoetus (Flying fish), Hippocampus (Sea horse), Labeo (Rohu), Catla (Katla), Clarias (Magur).

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