Question

What is cell theory? Who propounded it?​

Answer 1

Answer:

In biology, cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.

The classical cell theory was proposed by Theodor Schwann in 1839. There are three parts to this theory. The first part states that all organisms are made of cells.

Answer 2

Cell theory was expanded by Virchow in 1855 by suggesting that all cells arise from pre-existing cells All animals and plants are composed of cells, which serve as the units of structure and function and all cell arise from pre-existing cells. This is called the Cell Theory. It was propounded by Matthias Schleiden and Theodor Schwann in 1839 later on Rudolf Virchow added to this in 1858.