toads
frogs
salamanders
lizards
C. salamanders
frogs
fishes
lizards
pigeons
Gill slits in adults
Long vertebral column
Tail in adults
Teeth in both the jaws
blood circulation in the body.
venous system
arterial system
all of these
Hyla
Uraeotyphlus
Ophisaurus
Discoglossus
Uraeotyphlus
Triturus
Siren
Amphiuma
lizards
rabbits
salmanders
crocodiles
larger in size
stronger
larger sound box
vocal sac
Sparrow
Hyla
Mouse
Bufo
Anura
Apoda
Gymnophiona
Urodela
axial skeleton
appendicular skeleton
exoskeleton
visceral skeleton
Ichthyopsida
Ichthyopsaurus
Ichthyodactyla
Pterodactyla
tympanic membrane and tympanic cavity
middle ear ossicle
eustachian tube
all of these
Hyla
Bufo
Rhacophorus
Rana
thick and cornified epithelium
poorly cornified stratified squamous epithelium
a simple columnar epithelium
small microscopic scales in it
Anura
Apoda
Urodela
Caudata
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
ward off their enemies
attract the opposite sex
identify the same species
collect the young ones
have two auricles and one ventricle
have smooth moist skin
have a cloaca
respire by lungs in adult stage
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
Apoda
Caudata
Anura
Cyclostomata
feed
breathe
drink water
none of these
skull of frog
vertebrae of frog
sternum of frog
pelvis of frog
more terrestrial
more aquatic
more aerial
none of these
Alytes - midwife toad
Hyla - tree frog
Necturus - mud puppy
Bufo - common toad
Elasmobranch ancestors
Amphioxis like ancestors
Crosspterygian ancestors
None of these
dry
scaly
moist
both (a) and (c)
development of sturdy eggs
change over to herbivorous feeding
occurence of metamoophosis on amphibia
evolution of terrestrial habit
Oesophagus
Rectum
Duodenum
Intestine
Ichthyophis
Sharks
Rays
Cuttlefish
Hyla
Necturus
Rhacophorus
Ophisaurus