The independent variable is that in which the result is dependent on. For experiments, this is usually the item being varied. For this case, what is being varied is that one group is given caffeine while the other is not. That makes the amount of caffeine given to be our independent variable.
Fusion is the process which sun use to produce energy
The answer is 14y
I think
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A and B? im sorry if its wrong i havent learned that in a long while
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The survival of a bacterium in its natural habitat depends on its ability to grow at a rate sufficient to balance death caused by starvation and other natural causes such as temperature, pH, and osmotic fluctuations, as well as predation and parasitism.