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A student placed a solution of glucose and yeast in a vacuum bottle & sealed it with a two hole stopper...?
...The temperature of the yeast-glucose solution increased gradually with time, and the color of the indicator was observed and recorded throughout a 2-period day. The purpose of this investigation was most likely to
1. Study the relationship between temperature and pressure.
2. Demonstrate the release of energy by a chemical process.
3. Show that proteins are produced by yeast.
4. Study autotrophic nutrition in yeast.
My guess is to study autotrophic nutrition in yeast. It's the only one that makes any sense.
Thermos Intak Vacuum Insulated Hydration Bottle 26oz (770ml)