Question
Consider the following organisms
1. Agaricus
2. Nostoc
3. Spirogyra
Which of the above is / are used as biofertilizer / biofertilizers
(a) 1 and 2
(b) 2 only
(e) 2 and 3
(d) 3 only
Answer:
B
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Explanation:
Agaricus is not used as a biofertilizer. It is a genus of mushrooms commonly known as the button mushroom and is primarily consumed as food.
Nostoc is used as a biofertilizer. It is a genus of cyanobacteria (blue-green algae) that can fix atmospheric nitrogen and make it available to plants, thereby enriching the soil with nitrogen.
Spirogyra is not used as a biofertilizer. It is a filamentous green algae commonly found in freshwater habitats. While it plays a role in the ecosystem, it is not utilized as a biofertilizer.