Answer: A. The wave carries molecules of air away from the source of the sound .
Explanation:
Covalent bonds allow carbon atoms to form numerous compounds.
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Answer:
Basically, the Atrioventricular valves are Mitral and Tricuspid valves located between the atrium and ventricles. Their main functions is to “prevent the backflow of blood from the ventricles into the atrium during the ventricular contraction (systole).
Explanation:
