1. what is the ultimate source of all the energy that powers your cells (and > 99.9% of all life on earth)? a. when did this process evolve and how do we know? b. when did appreciable levels of oxygen (o2) begin to build up in the atmosphere? c. why was there such a long delay between the dates in part 2a and 2b above?

Early in the story when tom finds an indian skull in the woods which he kicks in temper. the devil then makes his appearance and, as tom surveys him, he notices that the devil is neither "negro" nor "indian." in fact, he has a "swarthy" complexion and is "begrimed with soot."

The investiture controversy began as a power struggle between pope gregory vii (1072–85) and henry iv, holy roman emperor (1056–1106).[2] a brief but significant struggle over investiture also occurred between henry i of england and pope paschal ii in the years 1103 to 1107, and the issue played a minor role in the struggles between church and state in france, as well.by undercutting the imperial power established by the salian emperors, the controversy led to nearly 50 years of civil war in germany, and the triumph of the great dukes and abbots. imperial power was finally re-established under the hohenstaufen dynasty. historian norman cantor:

Answer the zagros mountains, stretch across western iran and are located next to the khuzestan plain; answer( zagros mountains