Which of the following characteristics is correct for Reptilia?

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Body covered with dry and cornified skin, scales over the body are epidermal, they do not have external ears.

Body is covered with moist skin and is devoid of scales, the ear is represented by a tympanum, alimentary canal, urinary and reproductive tracts open into a common cloaca.

Fresh water animals with bony endoskeleton and air-bladder regulate buoyancy.

Marine animals with cartilaginous endoskeleton and body is covered with placoid scales.

answer is A.

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Detailed Solution

Body is covered by dry, cornified skin in reptiles. They have epidermal scales and no external ears.Moist skin is observed in amphibians.Bony fishes have air bladder and belong to Osteicthyes.Chondricthyes are cartilaginous fishes with placoid scales.

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