NEET 2004 Biology question

One of the following is a very unique feature of the mammalian body -

(1)Presence of diaphragmCorrect
(2)Four chambered heart
(3)Rib cage
(4)Homeothermy

Answer: (1)

Solution

A muscular diaphragm separating the thoracic cavity from the abdominal cavity is found only in mammals and is a unique feature that helps in breathing (together with the intercostal muscles). A

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Question ID VK-089514