Organisms refer to any living beings, including plants, animals, and microorganisms, that are studied in various fields of biology and related sciences. Organisms serve as the fundamental units of biological research, providing insight into the mechanisms of life, evolution, and ecological interactions. Research on organisms can involve studying their genetics, physiology, behavior, ecology, and relationships with other organisms in their environment. Organisms are diverse and complex, ranging from simple single-celled microbes to complex multicellular organisms like humans and other animals. Understanding organisms is essential for advancing our knowledge of the natural world and addressing various biological and environmental challenges.