Imagine what happens if materials are not send out of the body from time to time ?​

If waste materials are not sent out of the body from time to time they get accumulated in the body

have a great da

there really is life in the deepest part

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).