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Biology studies life across multiple levels, from molecules and cells to organisms, populations, and ecosystems.
Biology is the scientific study of life and living organisms. It is a broad natural science that examines how living things are structured and how they function, grow, originate, evolve, and are distributed across the planet. Biology uses unifying principles to explain these processes, including the idea that cells are the basic units of life, genes and heredity underlie inheritance, evolution drives biological diversity, energy transformation sustains life, and homeostasis maintains internal stability.
Biology studies life across multiple levels, from molecules and cells to organisms, populations, and ecosystems.
Modern biology is grounded in evolution by natural selection and in the molecular understanding of genes encoded in DNA.
Biology includes many subdisciplines (e.g., molecular biology, physiology, ecology, developmental and evolutionary biology, and systematics) that use observation, experimentation, and mathematical modeling.
Organisms are classified using taxonomy and phylogenetics based on shared characteristics and evolutionary relationships.
Biology is the scientific study of life and living organisms, including their structure, function, growth, origin, evolution, and distribution.
Cell theory states that cells are the basic unit of life and that living organisms are composed of cells.
Evolution by natural selection is the process by which heritable traits that improve survival and reproduction become more common over generations.
Homeostasis is the maintenance of stable internal conditions in an organism despite changes in the external environment.
Taxonomy is the science of naming, describing, and classifying organisms into an organized system.
Phylogenetics is the study of evolutionary relationships among organisms, often represented as evolutionary trees.
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