What is common in whale, bat and rat ?...

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

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The correct Answer is:

B

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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