CBSE 2022 · Region 3 · Set 1 · Q3 · 2 marks
Farmers are often suggested to use the following organisms in their crop land so as to improve the soil fertility.(i)Rhizobium (ii) Anabaena Explain.
Farmers are often suggested to use the following organisms in their crop land so as to improve the soil fertility.
(i)
Rhizobium (ii) Anabaena Explain.
Marking-scheme solution
(i)
Forms symbiotic association with roots of leguminous plants and helps in Nitrogen fixation
(ii)
Helps in Nitrogen fixation in aquatic or terrestrial environment and serves as biofertilizer / increases organic matter of soil.
Microbes in Human WelfareMicrobes as BiofertilisersUnderstandvery_short_answermedium
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.