Biology is the scientific study of life and living organisms, covering a wide range of topics from the smallest microorganisms to the largest animals and plants. It explores the structure, function, growth, evolution, and distribution of living beings. Biology is divided into various subfields, including. Biologists examine how organisms interact with each other and their environments, the processes that sustain life, and the mechanisms of growth, reproduction, and development. They also investigate the molecular and cellular bases of life, the genetic code, and the ways organisms evolve over generations.