What was the significance of the discovery of cell theory for the development of modern biology?

A cell is the smallest unit in the body’s system; it appears due to the division of other cells. The cell theory is a theory according to which plants and animals, as well as other organisms, have a single structural principle. This theory was created in the nineteenth century by Schwann and Schleiden (German scientists) and had two positions (modern cell theory has five main positions). This theory gives us the opportunity to expand the concept of cellular systems, a variety of tissues, organs.

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