The process in which nitrogen is converted into a usable form for life is called

early settlements on the subcontinent. both the indus and the ganges rivers carried rich silt from the mountains to the plains. when the rivers flooded, the silt spread over the plains and made the soil in the river valleys fertile for farming.

stewards ice box was the purchase of alaska from russia and it was called that because people thought it was not a good idea to purchase alaska