Explain cell theory. Who proposed cell theory? answer in about 120 words and please tell me full answer
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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. Cells are the basic unit of structure in all organisms and also the basic unit of reproduction. The three tenets to the cell theory are as described below:
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.
There is no universally accepted definition of life. Some biologists consider non-cellular entities such as viruses living organisms,and thus reasonably disagree with the first tenet.
The cell theory proposed that the cell is the fundamental, structural and functional unit of all living organisms and that the new cells are formed from the existing cells.
Robert Hook in 1665 coined the term cell while observing the plant cell under a microscope. In 1838 Matthias Jakob Schleiden, a botanist proposed that all plant tissues are made from cells. One year later, Theodor Schwann proposed that all animal tissues also are made from cells and that eggs are also cells as well. Rudolf Virchow in 1858 concluded that all cells come from preexisting cells, thus completing the classical cell theory.
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.
There is no universally accepted definition of life. Some biologists consider non-cellular entities such as viruses living organisms,and thus reasonably disagree with the first tenet.
The cell theory proposed that the cell is the fundamental, structural and functional unit of all living organisms and that the new cells are formed from the existing cells.
Robert Hook in 1665 coined the term cell while observing the plant cell under a microscope. In 1838 Matthias Jakob Schleiden, a botanist proposed that all plant tissues are made from cells. One year later, Theodor Schwann proposed that all animal tissues also are made from cells and that eggs are also cells as well. Rudolf Virchow in 1858 concluded that all cells come from preexisting cells, thus completing the classical cell theory.
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cell theory is the history of scientific theory, now universally accepted, that living organisms are made up of cells, that they are basic structure/organizational unit of all organisms, and that all cells come from preexisting cells.
The classic cell theory was proposed by Theodore Schwann in 1839
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