Class Osteichthyes: Subclass Sarcopterygii and Actinopterygii
Only surviving coelacanth is:
latimeria
hatfish
ratfish
eels
latimeria
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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
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
Function of swim bladder in class Osteichthyes is carried out by:
A. lungs
B. gills
C. pneumatic sacs
D. heart
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