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(a) List two bacteria which bring about ...

(a) List two bacteria which bring about nitrification.
(b) List one denitrifying bacteria.
(c) List any two bacteria which play a role in biological nitrogen fixation.

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(a) Nitrobacter, Nitrocystis.
(b) Pseudomonds.
( c) Azotobacter, Rhizobium leguminosarum.
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