Why are cells called the building blocks of an organism? A. They are visible to the naked eye.
B. They are made from nonliving materials.
C. They are the basic unit of life.
D. They are able to generate new cells.

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explanation:

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.