poisonous snake
non-poisonous snake
(a) or (b)
(a) and (b)
true snake
lizard
protochordate
pseudosnake
viper
krait
sea snake
cobra
nervous system
respiratory system
digestive system
excretory system
Garden lizard
Cobra
Chameleon
Python
Amphicoelous
Procoelous
Platycoelous
Gastrocoelous
dorsoventraly flattened
compressed from side to side
cylindrical and tapering
all of these
Chameleon
House lizard
Snake
Crocodile
turtles and tortoises
alligators
snakes
lizards
Their body is covered with dry, horny, mesodermal scales
Their skin is devoid of glands
They are poikilothermous
Their skeletons are more bony than in amphibians
coral snake
sea snake
sphenodon
garden lizard
snake
chelone
sea snake
lizard
Lizards
Sphenodon
Snakes
Crabs
The eardrum and middle ear are absent in snakes
Turtles are terrestrial whereas tortoises are aquatic
The rami of lower chin is fused in lizards
Crocodiles have a compressed tail
glass snake
blind snake
tree snake
sea snake
cobra
python
viper
krait
dermis
epidermis
cornified cells
stratum germinativum
Lizards have two pairs of pentadactyl limbs
Crocodile has webbed feet
Crocodiles are included under the sub-class Diapsida
The only poisonous lizard is varanus
cobra
krait
viper
sea snake
garden lizard
crocodiles
cobras
vipers
Eryx johnii
Naja naja
Enhydrina
Bungarus
mandibles
maxilla
squamosal
quadrate
Hetttidaclylus
Chameleon
Draco
Sphenodon
pre- and post-zygapophysis
zygantera and zygosphenes
neural arches and haemal arches
none of these
ribs and reduced limbs
ribs only
reduced limbs
reduced ribs
Glass snake
Coral snake
Rat snake
Blind snake
Diapsida
Sauropsida
Ichthyopsida
Synapsida
air
snout
skin
tongue
garial
alligator
crocodile
both (b) and (c)
Ophiothrix
Heloderma
Ophiosaurus
Both (a) and (b)