Which of the following is the characteristic feature that is found only in mammals?

Cutaneous gland

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Mammary gland

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Preen gland

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Poison gland

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Solution

The correct option is B Mammary gland
The presence of mammary glands that facilitates the organism to feed milk and nurture the young ones is the most significant character of the mammals. On the other hand, the preen gland and poison glands are not found in mammals, but are the features of aves and amphibians, respectively.

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