Microbe

Definition

A microbe is a microscopic organism, which may exist in its single-celled form or in a colony of cells. Microbes include bacteria, viruses, fungi, and protozoa.

5 Must Know Facts For Your Next Test

1. Microbes are ubiquitous and can be found in diverse environments, including extreme conditions.
2. Antonie van Leeuwenhoek is credited with the discovery of microbes using his handcrafted microscopes.
3. Louis Pasteur's experiments provided evidence against spontaneous generation and supported germ theory.
4. Microbes play essential roles in ecosystems, such as decomposing organic matter and fixing nitrogen.
5. Some microbes cause diseases in humans, animals, and plants, while others are beneficial for health and industry.

Related terms

Bacteria:

Single-celled microorganisms that can be found in various environments.

Virus:

Microscopic infectious agents that can only replicate within a host cell.

Germ Theory:

The theory that certain diseases are caused by the invasion of the body by microorganisms.