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Class – Aves : 1. Heart is completely four- chambered. 2. Respiration is by lungs. 3. Air sacs connected to lungs supplement respiration. Regarding 1,2 and 3:

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

1 Answer

(C) is the right answer.

Class – Aves : Heart is completely four- chambered. Respiration is by lungs. Air sacs connected to lungs supplement respiration.
answered Jan 6, 2014 by pady_1
 

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