This is totally false, the combination of the two could result in overdose or possibly death.
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What are the answers given?
C, if you look at a water wheel, water flows on the wheel, turning a rod, powering something on the inside. Dams do the same thing except the rod goes into a transformer and is more complicated.
B. Cells reproduce independently and viruses require a host to reproduce
The dependent variable is how high the ice cube floats (measured in units).