In the control bag we put a slice of bread in the bad with a damp cloth. In the bag that contained the variable, we put another piece of bread (the same kind) with a damp cloth, this time adding tomato extract. We then waited for the results. Sources of error: The water was contaminated and had microorganisms living in it. This could help promote growth of fungus or mold. When the blender was washed it might not have been cleaned properly.
We didn’t observe if we touched one piece of bread more than the other. Conclusion: The bread with the tomato extract on it had more growth than the bread with just the damp cloth. Therefore we can conclude that the growth promotion rate is greater on the bread with just the damp cloth than on the bread with the fruit extract. Bibliography: