What is the role of ammonia in the mechanism of the Birch reduction shown below? 
Definitions:
Bubonic Plague
An infectious disease caused by the bacterium Yersinia pestis, characterized by swollen lymph nodes, fever, and skin lesions.
Competitive Exclusion
A principle stating that two species competing for the same limiting resources cannot coexist at constant population values; one will always outcompete the other.
Predation
Interaction in which one organism (the predator) uses another (the prey) as a food source.
Batesian Mimicry
A form of mimicry where a harmless species has evolved to imitate the warning signals of a harmful species to deter predators.
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