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kaheart [24]
2 years ago
15

Please help urgent due today

Biology
2 answers:
Serjik [45]2 years ago
7 0

Answer:

Your answer is D.

Explanation:

Hope that answers your question.

Solnce55 [7]2 years ago
4 0

Answer:

D. they return nitrogen to the system

Explanation:

hope it helps

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