Class Osteichthyes: Subclass Sarcopterygii and Actinopterygii
Function of swim bladder in class Osteichthyes is carried out by:
lungs
gills
pneumatic sacs
heart
pneumatic sacs
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Number of living species of Actinopterygii’s is nearly:A. 30 species
B. 23 species
C. 25 species
D. 55 species
Gills in fishes supported by the:
A. trachea
B. gill arches
C. gills filaments
D. pharyngeal slits
Only surviving coelacanth is:
A. latimeria
B. hatfish
C. ratfish
D. eels
Lungfishes are included in class
A. Osteichthyes
B. Chondrichthyes
C. elasmobranchii
D. Holocephali
Fishes that migrate between marine and freshwater environment are called:
A. diadromous
B. dual nature
C. neutral species
D. all of above
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