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Dry cornified skin, epidermal scales and internal fertilisation characterise:

AReptilia
BAmphibia
CCyclostomata
DOsteichthyes
Answer & Solution
Correct answer: A. Reptilia
Reptiles have dry cornified skin with epidermal scales or scutes. They are poikilothermic, fertilisation is internal and development is direct. The heart is usually three-chambered, but crocodiles have four chambers.
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