Question

what are microorganisms? name a category of microorganisms that
can be seen under a microscope. Write a few lines about them​

Answer 1

A microorganism, or microbe, is a microscopic organism, which may exist in its single-celled form or a colony of cells. Microorganisms can be found almost anywhere on Earth. Bacteria and archaea are almost always microscopic, while a number of eukaryotes are also microscopic, including most protists, some fungi, as well as some micro-animals and plants. Viruses are generally regarded as not living and therefore not considered as microorganisms, although a subfield of microbiology is virology, the study of viruses. Bacteria is a category of microorganisms that can be seen under a microscope.