Agar culture is a method used in microbiology to grow and study microorganisms, such as bacteria and fungi. It involves using a gelatinous substance called agar, derived from seaweed, as a solid medium. This medium provides nutrients and a stable environment for the microorganisms to thrive, allowing researchers to observe their growth and behavior. In agar culture, petri dishes are commonly used to hold the agar. Scientists can inoculate the agar with samples from various sources, such as soil or clinical specimens. This technique is essential for identifying pathogens, testing antibiotic effectiveness, and conducting various biological experiments.