Deanna explains to Wesley the different types of nitrogen in the nitrogen cycle. Choose the sentences that she includes in her explanation. Select all that apply.

A.

Bacteria fix nitrogen from ammonia gas.

B.

Nitrates in soil are taken up by plant roots.

C.

Nitrifying bacteria convert ammonia to nitrates.

D.

Herbivores eat plants to fix nitrogen gas from the air.

E.

Nitrogen is found as a metal in the soil after it is fixed by bacteria.

The correct options are B and C

Explanation:

Option A is false because bacteria fix nitrogen by converting it into ammonia. The ammonia is used by the plants for different functions like development etc.

Option B is correct because plants can take up both ammonium ions and nitrate ions from the soil. They use these ions to make amino acids which are required by the plant for different activities.

Option C is correct because nitrifying bacteria are the bacteria which convert ammonia into nitrites and then nitrates in a process which is termed as nitrification.

Option D is false because herbivores eat plants to make amino acids and proteins.