Elasmobranch ancestors
Amphioxis like ancestors
Crosspterygian ancestors
None of these
C. Crosspterygian ancestors
Oviparous
Eggs non-mosaic
fertilisation external
Cleavage-meroblastic
Hyla
Bufo
Necturus
Ophisaurus
Frog
Necturus
Toad
Hyla
Cryptobranchus - hell blender
Necturus - mud puppy
Uraeotyphlus - blind worm
Alytes - midwife toad
axial skeleton
appendicular skeleton
exoskeleton
visceral skeleton
Apoda
Caudata
Anura
Cyclostomata
Hyla
Bufo
Rhacophorus
Rana
toads
frogs
salamanders
lizards
feed
breathe
drink water
none of these
lizards
rabbits
salmanders
crocodiles
thick and cornified epithelium
poorly cornified stratified squamous epithelium
a simple columnar epithelium
small microscopic scales in it
frogs
fishes
lizards
pigeons
it can get its food easily in water
its hindlimbs are webbed and help in swimming
it respires through skin
it can see through its transparent eye lids while swimming
nucleated and round
enucleated and oval
enucleated and round
nucleated and oval
ward off their enemies
attract the opposite sex
identify the same species
collect the young ones
Alytes - midwife toad
Hyla - tree frog
Necturus - mud puppy
Bufo - common toad
Necturus
Pipa
Amblyostoma
Cryptobranchus
blood circulation in the body.
venous system
arterial system
all of these
pronephric kidney
mesonephric kidney
metanephric kidney
both (a) and (b) ,
Uraeotyphlus
Triturus
Siren
Amphiuma
dry
scaly
moist
both (a) and (c)
single occipital condyle and 10 pairs of cranial nerves
single occipital condyle and 12 pairs of cranial nerves
two occipital condyles and 10 pairs of cranial nerves
two occipital condyles and 12 pairs of cranial nerves
Cryptobranchus - hell bender
Necturus - mud puppy
Amphiuma - congo cell
Rhacophorous - flying frog
Anura
Apoda
Gymnophiona
Urodela
Ichthyopsida
Ichthyopsaurus
Ichthyodactyla
Pterodactyla
larger in size
stronger
larger sound box
vocal sac
Salmander
Cryptobranchus
Necturus
Bufo
Elasmobranch ancestors
Amphioxis like ancestors
Crosspterygian ancestors
None of these
Ichthyophis
Sharks
Rays
Cuttlefish
Amphiuma
Ichthyophis
Salamander
Necturus