Which of the following are free living nitrifying bacteria 1 Aerobic Azobacter 2 ...........

Environment and Ecology Concept of Ecosystems

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Which of the following are free living nitrifying bacteria?

1. Aerobic Azobacter

2. Anaerobic Clostridium

3. Anabaena

4. Spirulina

Chose the best alternative

Only one statement is correct

Only two statements are correct

Only three statements are correct

All statements are correct

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Explanation:

1 and 2 only

In the nitrogen cycle, the nitrogen fixation is done by free living nitrifying bacteria such as aerobic azobacter and anerobic clostridium as well as fixed bacteria like Rhizobium. Anabaena and spirulina are examples of blue and green algae. Therefore, answer C is justified.