Why is it necessary that dna be replicated in mitosis

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Anyways, Most cells grow, perform the activities needed to survive, and divide to create new cells. These basic processes, known collectively as the cell cycle, are repeated throughout the life of a cell. Of the various parts of the cell cycle, the division portion is particularly important, because this is the point at which a cell passes its genetic information to its offspring cells. In many situations, division also ensures that new cells are available to replace the older cells within an organism whenever those cells die.

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  like australopithecus afarensis; probably the direct ancestor of this group. africa: 5.8 to 4.4 million years ago.