Activity 8.1 NCERT class 10 Science, How do Organisms Reproduce
Brief procedure: The activity 8.1 asks us to observe the slide of yeast in sugar solution.
Observation: Under the microscope, we see yeast reproducing by forming buds.
Yeast is a simple unicellular fungus. In a favourable medium, it reproduces by budding. Here, a small outgrowth appears in the yeast. Soon the genetic material duplicates itself, and one copy goes to the newly forming bud. Now bud detaches from the mother yeast and starts a new life-cycle.
Presence of sugar in solution acts as a favourable medium to the yeast as it provides them with a source of energy. Here Yeast utilises sugar and forms Alcohol with the release of carbon dioxide.
Application: In raising dough, we first increase the number of yeast by adding yeast to a warm sugar solution. This solution raises the dough faster.
See also: Other activities from chapter 8.
Read related article: Experiment to demonstrate yeast produces carbon dioxide — activity 6.5.