The selective service was designed to

create more rigorous requirements for men enlisting in the military

raise money for the war effort through the sale of war bonds

institute a draft to increase the number of men in the military

choose women to work in war related businesses

institute a draft to increase the number of men in the military

both are true, the congress does have the power to create banks, even if this power is not specifically described in the constitution, since there is nothing restricting it and there is power given to the congress to make "all laws which shall be necessary and proper". maryland was not allowed to tax a branch of the national bank operating there, and the supreme court decided that no state could. both of these topics were discussed in a decision of the mcculloch v. maryland case in 1819.