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Class – Mammalia : 1. The skin of mammals is unique in possessing hair. 2. External ears or pinnae are absent in most species. 3. Different types of teeth are present in the jaw. Regarding 1,2 and 3:

( a ) 1 is incorrect but 2 and 3 are correct
( b ) 3 is incorrect; 1 and 2 are correct
( c ) 2 is incorrect but 1 and 3 are correct
( d ) 1 is correct but 2 and 3 are incorrect
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1 Answer

(C) is the right answer.

Class – Mammalia : The skin of mammals is unique in possessing hair. External ears or pinnae are present. Different types of teeth are present in the jaw.
answered Jan 6, 2014 by pady_1
 

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