Research shows that mount everest grows an average of 4 mm each year how many years will it take for 720 millimeters a 40 b 100 c 180 d 720

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).