A. Nitrogen fixation D. NIE
5. Denitrification is when specialized bacteria in organisms convert ammonia to nitrogen gas.
a. True
b. False

A= the chemical processes by which atmospheric nitrogen is assimilated into organic compounds, especially by certain microorganisms as part of the nitrogen cycle. B=The NIE is a tax identification number in Spain, known in Spanish as the NIE, or more formally the Número de identidad de extranjero. The Spanish government have linked the NIE number to residence, where the NIE appears on the tarjeta de residencia, and to social security in Spain.

5= false  

Explanation:

the decreasing neutrality of the u. s. in world war i

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