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Azolla pinnata has been found to be an i...

Azolla pinnata has been found to be an important biofertiliser for paddy crops. This quality is due to the presence of

A

`N_(2)` fixing bacteria

B

`N_(2)` fixing cyanobacteria

C

mycorrhizae

D

all of these

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The correct Answer is:
B
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NCERT FINGERTIPS-MICROBES IN HUMAN WELFARE-Microbes In Human Welfare
  1. Cyanobacteria are

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  2. A nitrogen fixing microbe associated with the fern Azolla in rice fiel...

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  3. Azolla pinnata has been found to be an important biofertiliser for pad...

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  4. Which of the following is widely used as a successful biofertiliser in...

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  5. Study the following statements and select the correct ones (i) Metha...

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  6. Which of the following statements is/are correct ?

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  7. Which of the following options includes biofertilisers ?

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  8. Which of the following is a non-symbiotic biofertiliser ?

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  9. Nitrogen fixation in root nodules of Alnus is brought about by

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  10. Farmers have reported over 50% higher yields of rice by using which of...

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  11. Match column I with column II and select the correct answer from the g...

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  12. Which of the followig statements is/are incorrect ? (i) Cyanobacteri...

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  13. Match column I with column II and select the correct answer from the g...

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  14. Which of the following curves correctly represents the process of anti...

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  15. In a microbiology laboratory, the technician uses heat to sterilise th...

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  16. Study the given differences between primary sludge and activated sludg...

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  17. Microbe used for biocontrol of pest bufferfly caterpillars is

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  18. In batch fermentation

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  19. The vitamin whos content increases following the conversion of milk in...

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  20. Wastewater treatment generates a large quantity of sludge, which can b...

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