Procedure/ Materials: The process interpreted for this prove involved ii plastic (ziplock) bags, unrivaled for the control and one for the variable. In the control bag we go under a slash of bread in the bad with a bring out cloth. In the bag that contained the variable, we put another piece of bread (the like kind) with a tame cloth, this time adding tomato extract. We so waited for the results. Sources of mistake: The water was contaminated and had microorganisms living in it. This could suffice promot...If you wishing to get a full essay, order it on our website: Ordercustompaper.com
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