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Biology is the science of life. Its name is derived from the Greek words "bios" (life) and "logos" (study). Biologists study the structure, function, growth, origin, evolution and distribution of living organisms. There are generally considered to be at least nine "umbrella" fields of biology, each of which consists of multiple subfields.

• Biochemistry: the study of the material substances that make up living things
• Botany: the study of plants, including agriculture
• Cellular biology: the study of the basic cellular units of living things
• Ecology: the study of how organisms interact with their environment
• Evolutionary biology: the study of the origins and changes in the diversity of life over time
• Genetics: the study of heredity