Organ systems are made up of tissues which are made up of cells.
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The answer tot his question is:
<span>Fill in the blank.
</span>A scientific ___________ is a proposed explanation that can be tested."<span>Scientific Theory."
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Jaylamariejohsov5zsb
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The digestive system, it breaks down the material into nutrients and the circulatory system then carries it out to the cells throughout the body. hope this helps!!!
The answer is C. It eliminates the toxic chemical problem. Hope this helps!
D! Predictable and controlled