Class Osteichthyes: Subclass Sarcopterygii and Actinopterygii
Fishes that migrate between marine and freshwater environment are called:
diadromous
dual nature
neutral species
all of above
diadromous
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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
Function of swim bladder in class Osteichthyes is carried out by:
A. lungs
B. gills
C. pneumatic sacs
D. heart
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