How did these puppies end up with toenail thicknesses that are different from one another even though they have the same parents? How did the gene combinations result in the different traits?

All of the following are part of the biosphere except

Asap! will give brainiest when a heat wave strikes a region causing more people to run air-conditioning units, electrical demand increases. what needs to be done to meet this increased demand? raising the control rodslowering the control rodsremoving the control rods

List the path of the respiratory system