Fishes of sub class Dipnoi are called……
a) cartilaginous fishes
b) bony fishes
c) lung fishes
d) jawless fishes
Explanation: in extreme conditions they aestivate in holes and respire through the extremely vascularized swim bladder which acts as lung
How many living species of lung fishes left in the world?
a) two
b) three
c) four
d) five
Class Amphibia:
The name of amphibia is derived from a Latin word which means…….
a) lungs
b) gills
c) one
d) both
Explanation: the animals of this class have both aquatic and terrestrial characters
Which of the following class is considered as on the border of aquatic and terrestrial life?
a) pisces
b) amphibia
c) reptilia
d) aves
Which of the following fishes are believed to give rise amphibians during Devonian periods?
a) bony fishes
b) cartilaginous fishes
c) lung fishes (Dipnoi)
d) jawless fishes
