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Biology, 25.08.2019 07:30 rouna

Respiration in birds a) is inefficient because air only moves in one direction b)is highly efficient and ensures that air moves in multiple directions c) is highly efficient and ensures that air only moves in one direction d) is inefficient because of how air first enters into the body

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Respiration in birds a) is inefficient because air only moves in one direction b)is highly efficien...
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