Which of the following describes the role of nitrifying bacteria?
A. converts nitrogen into a usable form for plants
B. accesses free nitrogen from the atmosphere
C. is a building block of nucleic acids

The answer is option A.

converts nitrogen into a usable form for plants

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is this for the e2020 class

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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.