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A free-living nitrogen-fixing cyanobacte...

A free-living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is :

A

Tolypothrix

B

Chlorella

C

Nostoc

D

Anabaena

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The correct Answer is:
D
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AAKASH INSTITUTE-MINERAL NUTRITION-ASSIGNMENT (SECTION C)
  1. Element necessary for the middle lamella

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  2. Boron in green plants assists in

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  3. The most abundant element present in the plants is Or Which of th...

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  4. Necrosis, or death of tissue particularly leaf tissue, is due to the d...

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  5. Which of the following is not caused by deficiency of mineral nutritio...

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  6. When the plants are grown in magnesium deficient but urea rich soil, t...

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  7. The major portion of the dry weight of plants comprised of

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  8. Gray spots of oat are caused by the deficiency of

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

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  10. Which two distinct microbial processes are responsible for the release...

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  11. Nitrifying bacteria:-

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  12. Passive obsorption of minerals depends on

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  13. In root nodules of lengumes, leg-haemoglobin is important because

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  14. Leghemoglobin is

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  15. Which one of the following statements is correct ?

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  16. Enzyme first used for nitrogen fixation

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  17. Which one of the following elements plays an important role in biologi...

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  18. A free-living nitrogen-fixing cyanobacterium which can also form symbi...

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  19. If by radiation all nitrogenase enzyme are inactivated, then there wil...

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  20. Root of which plant contains a red pigment that has affinity for oxyge...

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