thick and cornified epithelium
poorly cornified stratified squamous epithelium
a simple columnar epithelium
small microscopic scales in it
B. poorly cornified stratified squamous epithelium
Ichthyophis
Sharks
Rays
Cuttlefish
frogs
fishes
lizards
pigeons
Salmander
Cryptobranchus
Necturus
Bufo
Ichthyopsida
Ichthyopsaurus
Ichthyodactyla
Pterodactyla
Hyla
Bufo
Necturus
Ophisaurus
nucleated and round
enucleated and oval
enucleated and round
nucleated and oval
Hyla
Uraeotyphlus
Ophisaurus
Discoglossus
dry
scaly
moist
both (a) and (c)
Oesophagus
Rectum
Duodenum
Intestine
larger in size
stronger
larger sound box
vocal sac
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
Hyla
Bufo
Rhacophorus
Rana
Salamandar
Discoglossus
Necturus
Amphiuma
Ram tigrina
Hyla
Rhacophorus
Amphiuma
Necturus
Pipa
Amblyostoma
Cryptobranchus
Amphiuma
Ichthyophis
Salamander
Necturus
Hyla
Necturus
Rhacophorus
Ophisaurus
Anura
Apoda
Gymnophiona
Urodela
skull of frog
vertebrae of frog
sternum of frog
pelvis of frog
Frogs
Salamander
Ichthyophis
Necturus
toads
frogs
salamanders
lizards
Cryptobranchus - hell blender
Necturus - mud puppy
Uraeotyphlus - blind worm
Alytes - midwife toad
feed
breathe
drink water
none of these
more terrestrial
more aquatic
more aerial
none of these
a single body segment each
a multiple number of body segments each
a single and from multiple segments respectively
none of these
pronephric kidney
mesonephric kidney
metanephric kidney
both (a) and (b) ,
Uraeotyphlus
Triturus
Siren
Amphiuma
blood circulation in the body.
venous system
arterial system
all of these
development of sturdy eggs
change over to herbivorous feeding
occurence of metamoophosis on amphibia
evolution of terrestrial habit
Apoda
Caudata
Anura
Cyclostomata