Chapter 1 - The Main Themes of Microbiology - Critical Thinking Questions - Bloom's Levels 3, 4, and 5: Apply, Analyze, and Evaluate - Page 24: 2

Ubiquitous implies that the thing is found almost everywhere. Microbes are ubiquitous because they are found in every climate and habitat, even in our food and bodies. Microbes like bacteria, archaea and fungi can live in every type of environment and in harsh conditions.

See answer above.