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frozen [14]
3 years ago
10

A bird flies by moving its wings up and down. Which two systems are most directly responsible for the movement of a bird's wings

?
A bird flies by moving its wings up and down. Which two systems are most directly responsible for the movement of a bird's wings?
A.
respiratory and muscular systems
B.
skeletal and digestive systems
C.
respiratory and digestive systems
D.
skeletal and muscular systems
Biology
1 answer:
Montano1993 [528]3 years ago
6 0

Answer:

D

Explanation:

skeletal and muscular systems

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