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26 Oct 2021
Background and context
According to the unified cell theory, each organism is made up of one or more cells, cells are the building blocks of each organism, and new cells arise from the pre-existing cells. This cell theory was formulated by Schwann, Schleiden, and Rudolf Virchow.
A cell is a structural and functional unit of life. Some organisms like prokaryotes are single-celled while others are multicellular.
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