Mineral Nutrition — BIOLOGY STD 11 Science — Question
Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYMineral Nutrition1 Mark
MCQ
Which of the following functions is associated with Nostoc?
A
Photosynthesis
B
Transpiration
✓
Nitrogen fixation
D
Carbon fixation
✓
Answer
Correct option: C.
Nitrogen fixation
There is two type of nitrogen-fixing bacteria one is free$-$living and another is symbiotic.
Some bacteria and blue-green algae like Nostoc are free$-$living bacteria and able to fix nitrogen from the atmosphere to enrich the soil with nitrogen and increase the soil fertility.
Rhizobium is the symbiotic bacteria that lives in root nodules of leguminous plants and fixes the atmospheric nitrogen in plants in the usable form.
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