Microorganism

Imagine trying to find your misplaced keys in a cluttered room. Just as you need to sift through and focus on the tiny details among the mess to spot the keys, scientists use microscopes to see microorganisms, like bacteria, amidst the vastness of the unseen world. The connection is that both scenarios require tools and techniques to identify and focus on something small and elusive within a larger, overwhelming context.
Practice Version

Microorganism: A very small organism that can only be seen with a microscope, like bacteria. Microorganism. Microorganisms are tiny living things that are too small to be seen with the naked eye and include bacteria, viruses, and fungi.