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Need with these questions . need the answers in a rush for these questions are the answers i put down are correct or not? ?
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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
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Biology, 22.06.2019 16:00
Which enzyme is responsible for “unzipping" the dna by breaking the hydrogen bonds between the nucleotides?
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El acero es homogénea, heterogénea, elemento, compuesto?...
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