define the state of quiescence of cell. Answer should be short as it is a short question. Answer and I will mark you as brainlist this question is from biology of class 9
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Quiescence is a temporary cell cycle state where populations of cells rest and do not replicate, before they are activated and re-enter the cell cycle.
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In 1839, M.J. Schleiden and T. Schwann proposed the cell theory. This was further expanded by Virchow in 1858. The main points of the cell theory are:
- (i) All living organisms are composed of cells. Hence, the cell is the structural and functional unit of all living organisms.
- (ii) All cells arise from pre-existing cells of the similar kind. Thus, the cell is the unit of heredity.
- (iii) The chemical composition and metabolism of all cells is basically alike.(iv) All living cells arise from existing cells by cell division.
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