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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

Anabaena

B

Tolypothrix

C

Chlorella

D

Nostoc

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The correct Answer is:
A
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ALLEN-DIVERSITY IN LIVING WORLD (PLANT DIVERSITY)-EXERCISE -III
  1. If by radiation all nitrogenase enzyme are inactivated, then thr...

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  2. Which one of the following paris is not correctly matched ?

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

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  4. The most thoroughly studied of the known bacteria-plant interactions i...

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  5. Top-shaped multiciliate male gametes and the mature seed which bears o...

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  6. Carbohydrates, the most abundant biomolecules on earth, are produced b...

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  7. Match items in Column I with those in Column II.

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  8. Barophilic prokaryotes

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  9. Auxospores and hormocysts are formed, respectively, by

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  10. Which of the following is not true for a species ?

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  11. Study the following statements carefully and give the answer:- a) Bi...

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  12. How many are the incorrect statements from the followings: a) In mus...

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  13. Which of the following is/are not carefully match?

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  14. How many of the following are taxa at ''class'' level ? plants , in...

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  16. Study the following statements carefully and give the correct answer :...

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  17. Some taxonomical aids are given in the following options, which growth...

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  18. Nomenclature is very must in taxonomy which of the following is not co...

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  19. The relation of solanaceae and convolvulaceae with polymoniales is sim...

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  20. Classification system are chaning every now and then because an attemp...

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