Please help me!
(how does nitrogen oxide destroy ozone layer?write with chemical reaction)

In nature, bacteria in soil and the oceans break down nitrogen-containing compounds, releasing nitrous oxide.  Nitrous oxide, like CFCs, is stable when emitted at ground level, but breaks down when it reaches the stratosphere to form other gases, called nitrogen oxides, that trigger ozone-destroying reactions

Explanation:

telophase and anaphase

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).