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in Classification of Vertebrates by (49.3k points)
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Give four features of class mammalia.

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  • Presence of corpus callosum in the brain.
  • Presence of external, middle and internal ears. 
  • The external ear has distinct pinna. The middle ear consists of three ear ossicles. 
  • Presence of scrolled and porous turbinal bone in the nasal cavities.
  • Presence of seven cervical vertebrae in the neck

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