What impact did the kansas-nebraska act have on the old missouri compromise line that had been the longtime border for slavery?

The line was made obsolete. The new arrangement was meant to be local voting on slavery in the new states of Nebraska and Kansas.

Explanation:

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).

the name of the theory is landmass theory.