Bacterial colonies are groups of bacteria that grow together in a specific area. They can be seen as small spots or clusters on surfaces like agar plates in a laboratory. Each colony originates from a single bacterium that divides and multiplies, creating a visible mass. The characteristics of a colony, such as color and shape, can help scientists identify different types of bacteria. These colonies are important for studying bacteria, as they allow researchers to observe their growth patterns and behaviors. By analyzing bacterial colonies, scientists can learn about antibiotic resistance, disease mechanisms, and even develop new medications.