asked 15.1k views
3 votes
2 Points

Which are forms of nitrogen that are usable by humans?
O
A. Ammonia, nitrates, nitrites
O
B. Oxygen, carbon, water
O
C. Nodules, roots, fertilizer
O
D. Phosphorus, nitrates, nodules

asked
User Patforna
by
8.1k points

2 Answers

5 votes

Answer:

A

Step-by-step explanation:

Its in plants

answered
User Berend De Boer
by
7.9k points
0 votes
A. Ammonia, nitrates, nitrites
answered
User Hatim Stovewala
by
8.8k points
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