The domain of biology is the scientific study of life and living organisms. It explores various aspects of life, including the structure, function, growth, evolution, and distribution of organisms. Biologists examine everything from tiny cells to complex ecosystems, helping us understand how life works and how different species interact with each other and their environments. Within biology, there are many subfields, such as zoology, which focuses on animals, and botany, which studies plants. Other areas include microbiology, the study of microorganisms, and genetics, which looks at heredity and variation in organisms. Together, these fields contribute to our knowledge of life on Earth.