Biosystematics is a branch of biology that focuses on the classification and evolutionary relationships of living organisms. It combines traditional taxonomy, which categorizes species based on shared characteristics, with modern techniques such as molecular biology and genetics. This approach helps scientists understand how different species are related and how they have evolved over time. By studying the genetic makeup and physical traits of organisms, biosystematics provides insights into biodiversity and the processes that drive evolution. It plays a crucial role in conservation efforts, as understanding species relationships can inform strategies to protect endangered species and their habitats, such as those involving ecosystems and habitat preservation.