Biology (from Greek life and bio-logy as a science - that životověda - exploring the science of life) in the broadest sense is the science dealing with organisms and everything related to them, the chemical processes in organisms taking place at the level of atoms and molecules, to throughout the ecosystem - a community of many populations of different organisms and their relations between themselves and their environment.
In a narrower sense, then we can describe biology as a science, exploring the organisms from the subcellular level, ie from the level of individual cell organelles, with everything related to them, despite the level of cells, tissues, organs and individuals to the level of populations, communities, ecosystems and biomes.
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