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All mammals have...

All mammals have

A

viviparity and biconcave red blood cells

B

extra-abdominal testes and a four chamabered heart

C

heterodont teeth and 12 pairs of cranial nerves

D

a muscular diaphragm and milk producing glands

Text Solution

Verified by Experts

The correct Answer is:
d
All mammals without and exception are charcterize by a muscular diphrag and milk producing glands.
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