Cells duplicate their DNA when they decide they need to divide. Cells divide for three main reasons: growth, repair, and reproduction. This could be during mitosis or meiosis. Mitosis is the dividing of your non-reproductive cells, and meiosis is the dividing of your reproductive cells
Explanation:
Growth. ... When one cell divides into two, both must have a copy of the genetic information. Therefore, before cell division occurs, the genes must also make duplicates of themselves so that all of the important genetic information ends up in each of the new cells.
Explanation: If cells didn't make a clone of them selves and they got damaged we would have hardly any cells left in our bodies to fight off infections
Because Astronomers have well-tested theoretical models that explain how a star evolves over the course of its life as well as well-tested theoretical models that explain how a star evolves over the course of its life.
