Which of the following statements about the nitrogen cycle is true? ammonification is the decomposition by bacteria of ammonia into nitrogen and hydrogen gases. the abundance of nitrogen is such that it is generally not a limiting factor upon the growth of an ecosystem. nitrification is the production by bacteria of nitrate from ammonia. denitrification is the removal and fixation by bacteria of nitrogen from the atmosphere?

bc blah

explanation:

bc blah

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.