CBSE 2022 · Region 4 · Set 1 · Q3 · 2 marks
Some of the microbes used as biofertilizers are prokaryotes. Name the taxonomic group they come under. With the help of an example, mention how they act as biofertilizers.
Marking-scheme solution
Bacteria / Cyanobacteria / Blue Green Algae
Rhizobium / Azospirillum / Azotobacter / Nostoc / Anabaena / Oscillatoria /
Fixes atmospheric Nitrogen into organic form / Enrich Nitrogen content of soil / Increases soil fertility
Microbes in Human WelfareMicrobes as BiofertilisersUnderstandvery_short_answermedium
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CBSE Class 12 Biology past-paper question from the 2022board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.