The Microscopic Marvels

The scientific study of microorganisms began in the 1670s.

A microorganism is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells.

Louis Pasteur discovered that microorganisms caused food spoilage.

<p>Anton van Leeuwenhoek is credited with the observation of microorganisms under the microscope.</p> Signup and view all the answers

<p>The domains Archaea and Bacteria contain microorganisms.</p> Signup and view all the answers

<p>Anton van Leeuwenhoek = Observation of microorganisms under the microscope Louis Pasteur = Found that microorganisms caused food spoilage Robert Koch = Discovered that microorganisms caused diseases like tuberculosis, cholera, diphtheria, and anthrax</p> Signup and view all the answers

<p>Archaea = Contains only microorganisms Bacteria = Contains only microorganisms Eukaryota = Includes all multicellular organisms as well as many unicellular protists and protozoans that are microbes</p> Signup and view all the answers

<p>Existence of unseen microbial life = Suspected from ancient times, such as in Jain scriptures from sixth century BC India Theory of spontaneous generation = Debunked by Louis Pasteur's finding that microorganisms caused food spoilage</p> Signup and view all the answers

<p>Tuberculosis = Caused by microorganisms Cholera = Caused by microorganisms Diphtheria = Caused by microorganisms Anthrax = Caused by microorganisms</p> Signup and view all the answers

<p>Microorganism = An organism of microscopic size, which may exist in its single-celled form or as a colony of cells Microbe = Another term for microorganism</p> Signup and view all the answers