Question

Help, Please?
Nitrogen is used by ____.

Answer 1

Everyone uses nitrogen all day every day. The earth's atmosphere is 78% nitrogen so you are breath it with every breath and it helps the body absorb oxygen and stabilizes your blood. It is also used in tires on airplanes and in airplane struts because it doesn't expand or contract as much as plain air. When it is kept below 370 degrees it will be in liquid form and can be used by doctors to freeze off warts or skin growths. It is used industrially for all manner of things.

Answer 2

Seriously, nitrogen is used by/in everything.

But if you're talking about nitrogen itself the molecule - there are special bacterial cells found usually in the soil that transform N2 from the atmosphere to biologically useful forms of nitrogen (NH3 and NO2).