Which one of the following mammals has mammary glands but no teats?

Ornithorhynchus

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Macropus

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Lemur

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Apes

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Solution

The correct option is B Ornithorhynchus
Mammary glands are the milk secreting organs and teat is a projection on mammary gland through which milk flows out. Teats are absent in primitive mammary glands. Such mammary glands are found in Platypus (Ornithorhynchus).
So, the correct answer is 'Ornithorhynchus'.

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