Which of the following variables was controlled in Experiment 1? F. Amount of yeast G. Percent of
Question:
Which of the following variables was controlled in Experiment 1?
F. Amount of yeast
G. Percent of molasses
H. Percent of sucrose
J. Carbon dioxide levels
Experiment 1
Since yeast needs sucrose to ferment and molasses is 60% sucrose, scientists first study yeast grown in molasses. Five test tubes are filled with .4 grams of yeast and various molasses concentrations. Carbon dioxide levels are measured as an indication of fermentation for each test tube after one day and again after two days. These levels are shown in Table 1.
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