Tiny organisms, also known as MICROBES, are microscopic living organisms that can be found in almost every environment on Earth. They are single-celled organisms, meaning they are made up of only one cell, and can range in size from 0.2 to 8 micrometers. MICROBES are incredibly diverse and can include bacteria, fungi, protists, and archaea. They play an important role in the environment, providing essential functions such as nutrient cycling, decomposition, and food production.