NEET 2000 Biology question

What is true for mammalia :

(1)Platypus is oviparousCorrect
(2)Bats have feather
(3)Elephant is a ovo viviparous
(4)Diaphragm is absent in them

Answer: (1)

Solution

Platypus (Ornithorhynchus) is a primitive egg-laying (oviparous) mammal (a monotreme), which is why (1) is true. Bats are mammals with a wing of skin stretched over the fingers - feathers are

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Question ID VK-088656