NEET Biology question

The unique character of animals belonging to class-Mammalia is

(A)Only mammals possesses hair on skin
(B)Completely four chambered heart
(C)Presence of mammary glandsCorrect
(D)Fertilisation is internal

Answer: (C)

Solution

Mammary glands, which give the class its very name, are the single most defining and exclusive mammalian character, used to nourish the young with milk.

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Question ID VK-106551