NEET BIOLOGY

Detailed explanation-1: -Explanation: The animals which give birth to young ones are called viviparous animals. Viviparous animals have external ears and body hairs. Examples: humans, elephants, cows etc.

Detailed explanation-2: -In the scientific world, this is called a monotreme; the two other types of mammals-placentals and marsupials-reproduce through live births.

Detailed explanation-3: -Mammals give birth to live young, right? That’s a huge component of what it means to be a mammal. Mammals are hairy, produce milk, are warm-blooded, and give birth to live young…

Detailed explanation-4: -The most important function of hair in mammals is that of insulating against cold by conserving body heat. The differing colours and colour patterns in hair coats can also serve purposes of camouflage and of sexual recognition and attraction among the members of a species.

Detailed explanation-5: -Giving birth to live animals provides protection inside the mother’s body from heat, cold, moisture and predators. Compare this to an egg-laying animal that must keep its eggs at a perfect temperature and keep watch that they are not eaten by predators.