I would say that it comes from rain overtime
The nucleus, which is in a cell. the nucleus acts like a control center. small parts of DNA can also be found in the mitochondria but the majority is located inside the nucleus of every cell
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Metaphase is the process third of mitosis when the chromosomes line up in the middle of the cell due to the spindle fibers pulling them in a single file line. Also the spindle fibers connect to the centromeres. Hope this helps :)