Unlike a dictatorship, a democratic government exists to serve the people, but citizens in democracies must also agree to abide by the rules and obligations by which they are governed. Democracies grant many freedoms to their citizens including the freedom to dissent and criticize the government.
A subject or class that teaches skills (such as cooking or sewing) which are useful in the home is home economic.
I think the group or government that benefited most from the decisions in McCuloch vs Maryland and Gibbson v. Ogden is : The Federal Government
Both of those case practically gave the federal Government more power by expanding it's authority over personal entity and individuals
hope this helps
Membrane is a specialized form of diffusion.