Definition of tae kwon do for English Language Learners. : a style of fighting that originated in Korea and that uses kicks and punches but no weapons. Britannica.com: Encyclopedia article about tae kwon do.
It is also used in the baking process as a leavening agent; yeast releasing gas into their environment results in the spongy-like texture of breads and cakes. Because of its role in fermentation, humans have known about and used Saccharomyces cerevisiae for a long time.
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.