Birds are characterized by the presence of
1.wings
2.beak
3.feathers
4.four chambered heart
Answers
Answered by
1
4. four chamber heart...
aashikapaneru23:
Human also have 4 chambered heart
ha
right hai
Yes
Answered by
1
1.wings
I think it is the right answer but not 100 % sure
option 3
right
and your also
There is not any option of all
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