Answers

2015-02-03T18:11:55+05:30
AVES -
    TAIL IS SHORT AND STUMPY 
    BODY IS MORE OR LESS SPINDLE 
    BONES ARE LIGHT
    SEXES ARE SEPARATE 
    LIMBS ARE MODIFIED INTO WING 

MAMMALIA -
       TAILS ARE LONG
       BODY IS DISTINCTLY DIVIDED INTO HEAD , NECK , TRUNK .
       BONES ARE HARD AS COMPARED TO AVES 
        LIMBS HAVE TWO PAIRS 
        IN MALE COPULATORY ORGAN IS PRESENT
       

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2015-02-03T19:31:59+05:30
Mammalia-
1.Dont produce eggs exception-echidna and platypus
2.Have mammary glands to feed young ones

Aves-
1.produce eggs
2.dont have mammary glands

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