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Biology, 22.06.2019 16:00, shaydog6353
Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems
Answers: 1
Biology, 22.06.2019 19:30, sarahelisabeth444
Explain what is meant by a river’s load, and describe how the load is carried.
Answers: 1
Which statement describes one feature of a mineral's definite chemical composition?
It always occu...
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