A "deme" is a term used in biology to describe a local population of organisms that are capable of interbreeding. These groups share a common gene pool and are often defined by geographic boundaries or specific environmental conditions. Demes play a crucial role in the study of evolution and ecology, as they help scientists understand how species adapt to their surroundings. In the context of ancient Greece, a "deme" referred to a subdivision of a polis or city-state. Each deme functioned as a local community with its own governance and social structure. This system was important for political organization and participation in the democratic processes of Athens, allowing citizens to engage in local and broader civic matters.