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प्रश्न
Which one of the following is not a nitrogen-fixing organism?
विकल्प
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.
Find out the role of microbes in the following:
Soil
What are 'biofertilizers'? Explain them with suitable examples.
Give the meaning of the Nif gene.
Define biofertilizers. Give two types of fungal biofertilizers
Identify free-living bacterial bio-fertilizer.
How does the activity of each one of the following help in organic farming?
Cyanobacteria
Name any two bacterial 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 |
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.
Mycorrhiza forms symbiotic association with ____________ of higher plants.
Blue green algae are used as bio fertilizers because they ____________.
VAM is a type of ______
An organism used as a biofertiliser for raising soyabean crop prediction is:
Some blue-green algae are used as bio fertilisers of their ______.
Glomus is a ______.
Biofertilizers are
Mycorrhiza does not help the host plant in ______.
Why are blue green algae not popular as biofertilisers?
Why are cyanobacteria considered useful in paddy fields?
Give two examples of biofertilizer.
Which one of the following statement is correctly matched?
Azolla is used as biofertiliser because it ______.
Which of following organisms cannot fix nitrogen?
- Azotobacter
- Oscillatoria
- Anabaena
- Volvoх
- Nostoc
Choose the correct answer from the options given below:
How many of the following are the symbiotic nitrogen fixing micro-organisms?
Rhizobium, Anabaena, Frankia, Azotobacter, Nostoc, Clostridium, Beijerinckia, Klebsiella
Endomycorrhizae grow in ______ of higher plants.
