This unit is based on History of Science and involves two tasks. In the 1st task, students work hands-on in growing their own microbial colonies. Here, a cooked-potato slice acts as a culture medium on which students can spread curd or buttermilk and keep it covered on a moist tissue paper to obtain a diverse microbial colonies within 24 hours. Students appreciate how a microbial colony looks like and understand the ubiquitous nature of microorganisms. The next task enables them to learn how, in 1928, the ubiquitous nature of microorganisms led to the accidental discovery of one of the most popular discoveries of the millennium- antibiotics- penicillin!
