How does ammonia enter waterways

I need the following information:

1. Chemical structure of amonia, functional any functional groups that are present

2. How does ammonia enter waterways

3. How does ammonia likely enter cells

4. What is a metabolic process that is negatively affected by the toxin

5. What organism or type of cells does the chosen metabolic process occur in/affect

6. Overall function of this metabolic process

7. Major way this metabolic process is regulated/controlled

8. Identify one major enzyme involved in this metabolic practice (include the gene that codes for the enzyme, the function of the enzyme, and the method of controlling the enzyme)

9. What happens when this metabolic process is inhibited/does not function

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