Very, very rare. Uranium used in power plants is typically only 3% U-235 (the explosive stuff), while bomb-grade uranium is nearly pure U-235. Simply, the concentration of U-235 in reactor-grade uranium is too small to start a chain reaction and detonate like a bomb.
I would say D because mechanical weathering is the breaking up of rocks by physical forces
Translation. The tRNA brings the corresponding amino acids to the ribosome.
