A cell's nucleus will divide during mitosis. What must happen before it can divide? the cell must make a copy of its DNA the ribosome must leave the cell the cell must make a copy of all its phospholipids the cell membrane must become selectively permeable

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

earthquakes in florida are rare because the state is not located near any tectonic plates. in fact, florida is tied for first place as having the fewest earthquakes of any state. much of florida is limestone and seafloor materials that is not conducive to earthquakes.

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