CBSE 2022 · Region 1 · Set 1 · Q10 · 3 marks
Enumerate the main sources of bio-fertilisers giving one example of each.
Marking-scheme solution
Bacteria-Rhizobium / Azospirillum / Azotobacter
Fungi-Mycorrhiza / Glomus
Cyanobacteria-Anabaena / Nostoc / Oscillatoria
Microbes in Human WelfareMicrobes as BiofertilisersRemembershort_answereasy
More from Microbes in Human Welfare
- Assertion: Activated sludge contains large population of bacteria. Reason (R): These bacteria help in…2026 · asked 3×
- Assertion: Flocs are masses of bacteria associated with fungal filaments in secondary treatment of sewage.…2026 · asked 3×
- Study the figure given below and answer the questions that follow. Identify the figure and state its…2025 · asked 3×
- Study the given diagram of Sewage Treatment Plant (S.T.P.) and answer the questions that follow: S.T.P.…2022 · asked 3×
- Mention the common bacterium found in the anaerobic sludge during sewage treatment and also in the rumen of…2022 · asked 3×
- (i) Name the protozoan species that is responsible for causing the most serious and even fatal malarial…2026 · asked 3×
- A laboratory assistant collected three water samples, namely river water, untreated sewage water and…2026 · asked 3×
- What do you mean by activated sludge in an STP? Explain the biological treatment of the major part of the…2025 · asked 3×
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.