Question

Assertion (A) : Reason (R) : Microorganisms are considered as friend and foe. Microorganisms play an important role in our lives. Some of them are beneficial in many ways whereas some other are harmful and cause diseases​

Answer 1

Answer:

Harmful effects of Microorganisms=

#A pathogen is a micro-organism that has the potential to cause disease.

#An infection is the invasion and multiplication of pathogenic microbes in an individual or population.

Disease is when the infection causes damage to the individual’s vital functions or systems.

#An infection does not always result in disease!

Information about it =

The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from sixth century BC India. The scientific study of microorganisms began with their observation under the microscope in the 1670s by Antonie van Leeuwenhoek. In the 1850s, Louis Pasteur found that microorganisms caused food spoilage, debunking the theory of spontaneous generation. In the 1880s, Robert Koch discovered that microorganisms caused the diseases tuberculosis, cholera, diphtheria, and anthrax.