_________ bacteria oxidise various inorganic substances such as nitrates, nitrites and ammonia and use the released energy for ATP production. They play an important role in recycling of nutrients (N, P, Fe, S etc.).
A
Photosynthetic autotrophic
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B
Chemosynthetic autotrophic
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C
Parasitic
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D
Saprophytic
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Solution
The correct option is B Chemosynthetic autotrophic Chemosynthetic bacteria are organisms that use inorganic molecules such as sulphates & ammonia as a source of energy.
So, the correct option is 'Chemosynthetic autotrophic'.