Grasses are a diverse group of plants that are commonly found in a variety of ecosystems around the world. They are characterized by their long, narrow leaves and hollow stems, and are typically grown for their use as food for animals, for erosion control, and for landscaping. Grasses play a vital role in many ecosystems, serving as important food sources for herbivores and providing habitat for a wide range of species. Researchers studying grasses may focus on a variety of topics, including their physiology, genetics, ecology, and evolutionary history. Additionally, grasses are important for human agriculture, with many species being cultivated for their seeds, which are used for food, fuel, and other purposes.