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Question

The unique features of mammals are :

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

II.Gives birth to a fully developed infant after gestation.

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

IV. All the mammals are  not viviparous.

Which of the above statement(s) are incorrect?


  1. I

  2. II

  3. III

  4. IV


Solution

The correct option is B

II


All the mammals are not viviparous; Infra mammals such as the members of prototheria group, e.g., platypus, are believed to be the link between reptiles and Mammals lay Eggs (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 protects them. 

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