What are the levels of biological organization?

The levels of biological organization are the different levels at which living organisms are arranged hierarchically, from the smallest unit of life to the biosphere. The levels include the atom, molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, and the biosphere. Each level is organized in a way that allows the complex structures and systems of living organisms to function and interact with the environment. Understanding the levels of biological organization is essential to the study of biology as it helps to explain how living organisms are interconnected and how they depend on one another for survival.

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