Where does agriculture rank in the United States based on size of industry? A. #1 B. #2 C. #4 D. #6​

i it is d i hope it

a time line cause it goes from 685 to 978

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).