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The greenhouse gas consumed by plankton and removed from the surface ocean when the dying cells sink to depth makes way for the uptake of more CO2. In a way, the tiny organisms act as a biological conveyer belt for the transport of carbon dioxide out of the surface and into the deep ocean.
By determining which factors affect the yeast activity, these variables can be controlled in the fermentation process. This experiment will illustrate to the student that the growth of yeast is affected by pH, temperature, and nutrient level and that one natural by-product of this fermentation process is carbon dioxide.y determining which factors affect the yeast activity, these variables can be controlled in the fermentation process. This experiment will illustrate to the student that the growth of yeast is affected by pH, temperature, and nutrient level and that one natural by-product of this fermentation process is carbon dioxide.