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The common nitrogen-fixer in paddy field...

The common nitrogen-fixer in paddy fields is

A

Rhizobium

B

Azospirillum

C

Oscillatoria

D

Frankia

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The correct Answer is:
B
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MOTION-MINERAL NUTRITION -EXERCISE-3
  1. Which one of the following is not a micronutrient

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  2. One of the free-living, anaerobic nitrogen-fixer is Or which of th...

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  3. The common nitrogen-fixer in paddy fields is

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  4. Study the cycle shown in Fig. 12.7 and select the option which gives c...

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  5. Leguminous plants are able to fix atmospheric nitrogen through the pro...

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  6. A prokaryotic autotrophic nitrogen fixing symbiont is found in

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  7. Which one of the following elements in plants is not remobilised ?

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  8. An organism used as a biofertilizer for raising soyabean crop is

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  9. Nitrifying bacteria

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  10. The function of leghaemoglobin in the root nodules of legumes is

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  11. Which one of the following is not an essential mineral element for pla...

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  12. Which one of the following ions is essential for photolysis of water?

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  13. Best defined function of manganese in green plants is

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  14. Which one of the following is wrong statement?

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  15. For its action, nitrogenase requires

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  16. The first stable product of fixation of atmospheric nitrogen in legumi...

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  17. Deficiency symptoms of nitrogen and potassium are visible first in

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  18. Minerals known to be required in large amounts for plant growth includ...

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  19. During biological nitrogen fixation, inactivation of nitrogenase by ox...

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  20. The oxygen evolved during photosynthesis comes from water molecules . ...

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