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