HNO 3 . Niche Adaptive role that a species has in a habitat . This includes its behavior and interactions with other species. Niche Specialization Process where evolution , through natural selection , adapts a species to a particular set of abiotic and biotic characteristics within a habitat . Nitric Oxide A gas produced by bacterial action in the soil and by high temperature combustion.
Nitrogen oxide is a component in the production of photochemical smog .
Nitrate Form of nitrogen commonly found in the soil and used by plants for building amino acids , DNA and proteins . It is commonly produced by the chemical modification of nitrite by specialized bacteria. The biochemical oxidation of ammonium to nitrite and nitrite to nitrate . This process is carried out by specialized bacteria . Nitrite Form of nitrogen commonly found in the soil .