Question

What are microorganism

Answer 1

A microorganism or microbe is amicroscopic living organism, which may be single-celled[1] ormulticellular. The study of microorganisms is calledmicrobiology, a subject that began with the discovery of microorganisms in 1674 by Antonie van Leeuwenhoek, using amicroscope of his own design.

Microorganisms are very diverse and include all bacteria, archaeaand most protozoa. This group also contains some species of fungi,algae, and certain microscopic animals, such as rotifers. Manymacroscopic animals and plantshave microscopic juvenile stages. Some microbiologists also classifyviruses (and viroids) as microorganisms, but others consider these as nonliving.[2][3] In July 2016, scientists reported identifying a set of 355 genes from the last universal ancestor of alllife, including microorganisms, living on Earth.[4]

Answer 2

Microorganisms are microscopic, living, single-celled organisms such as bacteria. Ubiquitous throughout the world, microorganisms play a vital role in supporting and maintaining nature and life. The vast majority are beneficial: They keep nature clean by removing toxins from water and soil, and degrade organic matter from dead plants and animals. In the human body they aid in digestion and help prevent invasion by harmful bacteria. Without bacteria, life would not be possible.