Sunday, March 11, 2012

Comparison between Lizards and Snakes


Lizards
Snakes
1.        Slightly compresed body
Cylindrical body
2.        Two pairs of limbs
Limbs are absent
3.        Exoskeleton is not removed by moulting
Exoskeleton is removed periodically by moulting
4.        Scales are uniform in size
Scales are differentiated into plates and shields
5.        Nictitating membrane is present
Absent
6.        Tympanic membrane is present
Absent
7.        Tongue is not bifid
Tongue is bifid
8.        They can hear air-borne sound
They cannot hear air-borne sound
9.        Urinary bladder is present
Absent
10.     Jaw bones are fixed
Jaw bones are movable


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