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Biology · 2026 · 1 mark
CBSE 2026 · Region 4 · Set 2 · Q7
Some cyanobacteria in aquatic and terrestrial environment that enrich the soil by fixing nitrogen are:
Some cyanobacteria in aquatic and terrestrial environment that enrich the soil by fixing nitrogen are :
Official answer
(C)
Anabaena and Nostoc
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CBSE Class 12 Biology past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.