Which hormone triggers the opening of bronchioles in the lungs and the breakdown of glycogen into glucose?

The hormone adrenaline triggers the opening of bronchioles in the lungs and the breakdown of glycogen into glucose

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).