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Answer:
This question is incomplete; the complete part is:
A) All cell have a cell wall.
B) All cell arise from pre-existing cells.
C) All cell are capable of photosynthesis.
D) All cell can develop into any other type of cell.
The answer is B
Explanation:
The commonly known universal theory proposed in 1838 took the contribution from three remarkable scientists namely: botanist Matthias Schleiden, anatomist Theodor Schwann and biologist Rudolph Virchow. According to the question, Mathias discovered that all plants are made of cells, Schwann determined that all animals are made of cells while Virchow determined that all living things are composed of cells.
However, in addition to Virchow's discovery, he also discovered and proposed that "All cell arise from pre-existing cells", which till date forms part of the three components of the cell theory. The three parts are:
- Cell is the fundamental and basic unit of all living things.
- All living things are made up of one or more cells
- All cells arise from pre-existing cells
The cells arose from the preexisting cells is the statement, which is also a part of the cell theory given by Virchow.
• A German biologist who worked and built his own theory on the work of other scientists like Theodor Schwann is Rudolph Virchow.
• Virchow rejected the idea of spontaneous generation after performing many studies and believed that cell differentiation only occurs in some of the unique cells and not in all the cells.
• Even though the idea of cells arising from the preexisting cells was not first brought into light by Virchow, however, he was the one who popularized the concept and added it to the initial belief that all the living organisms are formed of cells.
Thus, the statement, that is, the cells arising from prexisting cells is also part of the cell theory given by Virchow.
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