State briefly the three major points of the cell theory as proposed by Schwann and Schleiden and modified by Virchow.
Question
State briefly the three major points of the cell theory as proposed by Schwann and Schleiden and modified by Virchow.
Solution
The three major points of the cell theory as proposed by Schwann and Schleiden and modified by Virchow are:
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All living organisms are composed of one or more cells. This point was proposed by both Schwann and Schleiden, stating that the cell is the basic unit of life.
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The cell is the basic unit of structure and organization in organisms. This point further emphasizes the first point by stating that cells provide structure for the body, take in nutrients from food and carry out important functions.
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Cells arise from pre-existing cells. This point was added by Virchow, modifying the original cell theory by proposing that new cells are formed from the division of existing cells. This concept refuted the previous idea of spontaneous generation.
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Cell theory was first proposed in 1838. Evidence obtained through additional scientific investigations resulted in the current cell theory. Which statement describes a component of the original cell theory that was removed because of the new scientific knowledge?Group of answer choicesCells form through spontaneous generation.Cells are the basic structural and functional units of life.All living things are made of cells.All living things are made of cells.
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