Which of the following is a nitrogen-fixing blue-green algae of soil?
- Rhizobium
- Nitrosomonas
- Clostridium
-
Anabaena
The correct answer is: D
Explanation
Anabaena is a genus of filamentous cyanobacteria that exist as plankton. They are known for nitrogen-fixing abilities, and they form symbiotic relationships with certain plants.
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