(A)Body covered with moist skin which is devoid of scales, the ear is represented by a tympanum, alimentary canal, urinary and reproductive tracts open into a common cloaca
(B)Fresh water animals with bony endoskeleton, air-bladder to regulate buoyancy
(C)Marine animals with cartilaginous endoskeleton, body covered with placoid scales
(D)Body covered with dry and cornified skin, scales over the body are epidermal, they do not have external earsCorrect
Answer: (D)
Solution
Reptiles are correctly characterised by dry, cornified skin bearing epidermal scales, and by the absence of external ear pinnae (though an internal tympanum is present). Option (a) describes amphibian
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