All mammals , without any exception , are characterised byA. viviparity and biconcave red blood cellB. extra-abdominal testis and four-chambered heartC. heterodont teeth and 12 pairs of cranial nervesD. a muscular diaphragm and milk producing glands

All mammals , without any exception , are characterised byA. viviparit

1.	All mammals , without any exception , are characterised byA. viviparity and biconcave red blood cellB. extra-abdominal testis and four-chambered heartC. heterodont teeth and 12 pairs of cranial nervesD. a muscular diaphragm and milk producing glands
Answer» Correct Answer - D Any animal of the mammalia a large class of warm-blood vertebrates having milk producing mammary gland in the remale, a thoracic diaphragm and a four-chambered heart.

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All mammals , without any exception , are characterised byA. viviparity and biconcave red blood cellB. extra-abdominal testis and four-chambered heartC. heterodont teeth and 12 pairs of cranial nervesD. a muscular diaphragm and milk producing glands

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