pronephric kidney
mesonephric kidney
metanephric kidney
both (a) and (b) ,
B. mesonephric kidney
Ichthyopsida
Ichthyopsaurus
Ichthyodactyla
Pterodactyla
ward off their enemies
attract the opposite sex
identify the same species
collect the young ones
Amphiuma
Ichthyophis
Salamander
Necturus
larger in size
stronger
larger sound box
vocal sac
lizards
rabbits
salmanders
crocodiles
pronephric kidney
mesonephric kidney
metanephric kidney
both (a) and (b) ,
Alytes - midwife toad
Hyla - tree frog
Necturus - mud puppy
Bufo - common toad
Elasmobranch ancestors
Amphioxis like ancestors
Crosspterygian ancestors
None of these
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
They have middle ear apparatus
They show parental cafe
They lose tail and gills during metamorphosis
All of these
Hyla
Uraeotyphlus
Ophisaurus
Discoglossus
Salmander
Cryptobranchus
Necturus
Bufo
Ichthyophis
Sharks
Rays
Cuttlefish
Necturus
Pipa
Amblyostoma
Cryptobranchus
Anura
Apoda
Gymnophiona
Urodela
feed
breathe
drink water
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
nucleated and round
enucleated and oval
enucleated and round
nucleated and oval
development of sturdy eggs
change over to herbivorous feeding
occurence of metamoophosis on amphibia
evolution of terrestrial habit
Hyla
Bufo
Necturus
Ophisaurus
axial skeleton
appendicular skeleton
exoskeleton
visceral skeleton
toads
frogs
salamanders
lizards
tympanic membrane and tympanic cavity
middle ear ossicle
eustachian tube
all of these
Oesophagus
Rectum
Duodenum
Intestine
skull of frog
vertebrae of frog
sternum of frog
pelvis of frog
Sparrow
Hyla
Mouse
Bufo
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
thick and cornified epithelium
poorly cornified stratified squamous epithelium
a simple columnar epithelium
small microscopic scales in it
blood circulation in the body.
venous system
arterial system
all of these
have two auricles and one ventricle
have smooth moist skin
have a cloaca
respire by lungs in adult stage