1. Nitrogen fixation: Nitrogen fixation occurs when (a) converts N2 gas into (b) that living things can take up. 2. Ammonification: In this step, bacteria in soil or fungi will convert nitrogen into

3. Nitrification: A 2-step process:

Step 1: Soil bacteria converts (a) into (b)

Step 2: Soil bacteria then convert nitrite ions into (c)

4. Denitrification: In this process (a) are converted to (b) gas, which are then released to the atmosphere.

5. Assimilation: This occurs when .

Nitrogen fixation occur when nitrogenase convert N2 into ammonia gas that living thing can take up.

Ammonification bacteria in soil or fungi will convert nitrogen into ammonia compound.

3. Nitrification.

Soil bacteria converts ammonia to nitrite.

Soil bacteria then convert nitrite ions into nitrate.

4. Denitrification in this process , nitrate is converted to nitrogen gas, which are then released to the atmosphere

Assimilation occurs when minerals and vitamins are absorbed in the food by the intestine.

Explanation:

Nitrogen fixation is the process where nitrogen is fixed and made available by living things in which nitrogenase convert nitrogen to ammonia.

Ammonification is the process by which organic nitrogen is converted to ammonia compounds by bacteria and fungi

Nitrification is the process where nitrifying bacteria convert ammonia to nitrite and then nitrite to nitrate.

Denitrification is the process where nitrate is reduced or converted to nitrogen gas.

Assimilation is the process of absorbing vitamins and minerals from food by the intestine.