1-Microorganisms helps us in making alchol. 2- Microorganisms helps us in bakery. 3-Microorganisms us in making medicines. 4-Microorganisms us in making curd. 5- Microorganisms fix atmospheric nitrogen ( NO2 ) to the soil. 6- Microorganisms helps us in resarching on diseases. 7- Microorganisms replinsh the soil.
The two main branches of biology are BOTANY (study of plants) and ZOOLOGY (study of animals). Although there have been discussions that there are actually three main branches of biology, this time including MICROBIOLOGY (study of microorganisms), but as far as it goes, botany and zoology are still the main branches of biology