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Which parts of the heart prevent backflow of blood in the circulatory system and allow the heart to work like a pump? a.)atria b.)valves c.)ventricles
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Match the functions to the cell types ? contraction and relaxation. conducting electrochemical signals fighting diseases carrying genetic material
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Black fur(b) in guinea pigs is dominant over white fur(b). find the probability of a homozygous offspring in a cross: bb x bb. a. 0% b. 25% c. 50% d. 75% e. 100%
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Which parts of the heart prevent backflow of blood in the circulatory system and allow the heart to...
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