Question

The cell theory was proposed by________.

Answer 1

Cell theory:

1. The cell theory was proposed by Matthias Jakob Schleiden and Theodor Schwann.
2. This theory proposed that “ all living beings whether plants or animals are composed of a group of cells which arise from the pre-existing cells.”
3. Each cell is made of protoplasm having a nucleus and is bounded by a cell membrane with or without a cell wall.
4. Viruses are an exception to cell theory because they have no cell organelles and no host is needed to replicate them.

Main assumptions of cell theory:

1. All living organisms are composed primarily of cells and cell products.
2. Cells are the structural and functional units of our life.
3. All cells originate only from pre-existing cells.
4. Each cell is made of protoplasm having a nucleus and is bounded by a cell membrane with or without a cell wall.

Final answer: The cell theory was proposed by Matthias Jakob Schleiden and Theodor Schwann.