Definition
*Euglena* is a genus of single-celled organisms found in freshwater. They are unique because they have characteristics of both plants and animals. They can perform photosynthesis like plants, using light to create energy. But they can also consume other organisms for food when light is scarce. They move using a flagellum, a whip-like tail. Think of them as tiny, self-powered, versatile survivors. They show the amazing adaptability of life.