Animal KingdomHard
Question
All mammals without any exception are characterized by
Options
A.viviparity and biconcave red blood cells.
B.extra-abdominal testes and a four -chambered heart.
C.heterodont teeth and 12 pairs of cranial nerves.
D.amuscular diaphragm and milk producing glands.
Solution
Mammals are characeerised by musclular diaphragmand milk producing glands.
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