MCQ
Some blue green algae can be used as biofertilizer as they are:
- APhotosynthetic
- BSurrounded by mucilage
- CGrowing every where
- ✓Capable of fixing nitrogen
✓
Answer
Correct option: D.
Capable of fixing nitrogen
Some blue$-$green algae can fix atmospheric nitrogen because they contain an $O_2$ sensitive enzyme nitrogenase. They live in close association with the roots of the plant and fix the atmospheric nitrogen into the soluble form which is utilized by the plant.
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