Which is more important in the prophase of mitosis, that the chromatid pairs become visible, or the nuclear membrane disappears?

The chromatid pairs become visible
Describing how is the cells group is the process of multiplication of cell or the so-called cell division, mitosis. This mechanism of each cell produces another cell that binds together and produces again, repeatedly, to be a larger system called now the tissue as explained earlier. How? Through cell division called, mitosis. Excerpt meiosis –cell division specifically in the sex cells. 

Animals will lose energy because it is converted to heat

A.children playing educational games