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.
Activity In this activity, you will 1. determine what factors affect the growth of yeast cells during fermentation, and 2. observe that one by-product of the fermentation process is carbon dioxide (CO 2) gas.ctivity In this activity, you will 1. determine what factors affect the growth of yeast cells during fermentation, and 2. observe that one by-product of the fermentation process is carbon dioxide (CO 2) gas.