Serfdom originated at the end of the Roman Empire with the coloni, who can best be described as

1. what is significant about the power that russian federal cities are granted? 2. what is significant about official languages in russian republics? why would it matter?

What actions did americans take to show their patriotism after pearl harbor?

Marine exptoration of oil uses seismic waves to locate oil in the seabed. what is a negative impact from seismic waves on the aquatic ecosystem of the ocean? a.seismic waves kill microoganisms b.seismic waves disrupts the sand and causes seafloor erosion c.seismic waves have virtually no adverse affects on marine life d.seismic waves damage the sonar that dolphins and whales use to orient themselves underwater