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What is common in whale, bat and rat?

(a) Absence of neck

(b) Muscular diaphragm between thorax and abdomen

(c) Extra-abdominal testes to avoid high temperature of body

(d) Presence of external ears

1 Answer

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Correct option  (b) Muscular diaphragm between thorax and abdomen

Explanation:

The presence of diaphragm is a characteristic feature of mammals, diaphragm acts as a separater between thorax and abdomen. Whale bat and rat all are mammals and have diaphragm.

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