Answer:
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Explanation:
When skin cells are damaged by ultraviolet radiation from the sun, the cells present in the tissue of the skin are triggered to start dividing by mitosis in order to produce new cells that replace the damaged cells. Thus, new cells are produced from the old cell.
This phenomenon agrees with the part of the cell theory that says that cells can only arise from preexisting cells. More specifically, cells are only able to arise from preexisting cells through the process of cell division.
The damaged skin cells are replaced by the new cells, which are formed of the cells that preexists, that is, present already, this supports one of the cell theory that all cells originate from the preexisting cells.
• The three prime points of the cell theory are that all the living things are formed of cells. The cells are the fundamental units of life, and all the cells comes from the preexisting cells by the process of cell division.
• The cells are always formed from the cells already present.
• In case, if the skin cells gets damaged by UV rays from the Sun, they get replaced by the help of cells, which are already present underneath the dead cells.
• These new cells do not come from thin air, the cells underneath get triggered and by the process of mitosis give rise to novel cells.
Thus, the replacement of the damaged skin cells by the new cells proves theory that all the cells comes from the preexisting cells by the process of cell division.
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