Were there any points in history when democracies declined for a sustained period? What caused the drop?

the of atp are the key to its ability to store and supply energy;

phosphate

the phosphate groups of atp are the key to its ability to store and supply energy. atp releases energy when it breaks bonds between its phosphate groups.

naturalization is the process of gaining united states citizenship. becoming an american citizen is the ultimate goal for many immigrants, but very few people are aware that the requirements for naturalization have been over 200 years in the making.