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Which characteristic(s) help birds maintain flight? A. large heart B. no bladder C. air sacs D. b and c E. a, b, and c
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1 vote
Which characteristic(s) help birds maintain flight?

A. large heart
B. no bladder
C. air sacs
D. b and c
E. a, b, and c

User Lamanus
by
7.1k points

1 Answer

1 vote
The answer is C.Air Sacs
User Didier Ghys
by
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