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Question

A few unique features of mammals are listed here. Pick the incorrect one(s).

I. Body is covered with skin and hair which are thermoregulatory in function.

II. All mammals give birth to a fully developed infant after gestation.

III. Feeds the infant with milk from modified sweat glands.

IV. All mammals are not viviparous.


A

I

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B

II

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C

III

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D

IV

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Solution

The correct option is B

II


All the mammals are not viviparous; Lower mammals such as the members of prototheria group, e.g., platypus, are oviparous. Also, marsupials like kangaroos and koalas do not give birth to fully developed infants, and they are cared for after birth by the mother in special pouches that protect them.


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