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Microorganism - Definition, Types, Examples & Quiz - Biology …
Microorganism - Wikipedia
Microbiology | Definition, History, & Microorganisms | Britannica
Microbiology - Bacteria, Viruses, Fungi | Britannica
1.3: Types of Microorganisms - Biology LibreTexts
What is a microorganism? - BBC Bitesize
Microorganisms – introduction — Science Learning Hub
1.1A: Defining Microbes - Biology LibreTexts
Microbiology - Bacteria, Viruses, Fungi | Britannica
Bacteria - Wikipedia