1.

What is common in whale, bat and rat ?A. Absence of neckB. Muscular diaphragm between thorax and abdomenC. Extra-abdominal testes to avoid high temperature of bodyD. Presence of external ears

Answer» Correct Answer - 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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