By the 1850s the constitution originally framed as an instrument of the national unity, had become a source of sectional discord and tension and ultimately contribute to the failure of the union it had created.
assess the validity of this statement

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.

i believe that the correct answer is a canadian hero.

explanation: he is celebrated as a national hero in canada for successfully thwarting a united states takeover of canada during the war of 1812.