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प्रश्न
Which one of the following is not a nitrogen-fixing organism?
पर्याय
Anabaena
Nostoc
Azotobacter
Pseudomonas
Rhizobitim
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उत्तर
Pseudomonas
Explanation:
- Pseudomonas is a common soil bacterium but does not fix atmospheric nitrogen.
- Nostoc, Anabaena, and Rhizobium are nitrogen-fixing organisms that convert atmospheric nitrogen (N2) into usable forms for plants.
Hence, Pseudomonas is not a nitrogen-fixing organism.
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संबंधित प्रश्न
Microbes can be used to decrease the use of chemical fertilisers and pesticides. Explain how this can be accomplished.
What are 'biofertilizers'? Explain them with suitable examples.
What is a heterocyst?
Your advice is sought to improve the nitrogen content of the soil to be used for cultivation of a non-leguminous terrestrial crop.
- Recommend two microbes that can enrich the soil with nitrogen.
- Why do leguminous crops not require such enrichment of the soil?
How does the activity of each one of the following help in organic farming?
Cyanobacteria
Which one of the following is a free-living bacterial biofertilizer?
Name any two bacterial biofertilizers.
______ associated with plants like Azolla and Cycas can be used as a biofertilizers.
Match the column A with B and rewrite correct pairs.
| A | B | |
| i. | Symbiotic N2 fixing bacteria | VAM |
| ii. | Free-living N2 fixing bacteria | Rhizobium |
| iii. | Phosphate solubilizer | Nostoc |
| iv. | Endomycorrhizae | Microccocus |
Identify the CORRECT statement regarding Ectomycorrhizae.
From the following pairs of microbes, identify the pair that has both the microbes that can be used as Biofertilizers.
Mycorrhiza is a______ which forms a symbiotic association with the underground parts like rhizomes and root of higher plants.
Which of the following is/are symbiotic nitrogen fixing microbe?
Anabaena forms symbiotic relationship coralloid roots of ______.
In plant breeding, biofortification is a method ____________.
The biological agent which is used to kill or check proliferation of disease causing agents is called ____________.
VAM is a type of ______
An organism used as a biofertiliser for raising soyabean crop prediction is:
Which one of the following is not a biofertilizer?
Some blue-green algae are used as bio fertilisers of their ______.
Glomus is a ______.
Mycorrhiza does not help the host plant in ______.
Why are cyanobacteria considered useful in paddy fields?
Give two examples of biofertilizer.
Match the pairs:
| Column A | Column B | ||
| (i) | Compost making biofertilizer |
(a) | Azotobacter |
| (ii) | N2 fixing biofertilizer | (b) | Mycorrhiza |
| (iii) | Fungal biofertilizer | (c) | Agrobacterium |
| (iv) | Phosphate solubilizing biofertilizer |
(d) | Actinobocteria |
