Question

What is cell theory and also explain the expanded cell theory. Name the scientist who presented it.

Answer 1

Credit for developing cell theory is usually given to three scientists: Theodor Schwann, Matthias Jakob Schleiden, and Rudolf Virchow. In 1839, Schwann and Schleiden suggested that cells were the basic unit of life. Their theory accepted the first two tenets of modern cell theory (see next section, below). However the cell theory of Schleiden differed from modern cell theory in that it proposed a method of spontaneous crystallization that he called "Free Cell Formation" . In 1858, Rudolf Virchow concluded that all cells come from pre-existing cells, thus completing the classical cell theory.

Answer 2

Explanation:

All living organisms are composed of one or more cells. The cell is the basic unit of structure and organization in organisms.

Cells arise from pre-existing cells.