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Azolla enriches rice fields with nitrog...

Azolla enriches rice fields with nitrogen due to its association with
Or
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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MODERN PUBLICATION-ORGANISMS AND POPULATIONS -COMPETITION FILE (OBJECTIVE TYPE QUESTIONS)(A. MULTIPLE CHOICE QUESTIONS)
  1. What is the keystone species?

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  2. Which are true about the following statements about kangaroo rats (a...

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  3. Azolla enriches rice fields with nitrogen due to its association with...

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  4. Maximum growth rate occur in

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  5. The presence of diversity at the junction of territories of two differ...

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  6. July 11 is observed as

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  7. Study of ecology of population is called

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  8. The amount of fresh water of the earth frozen as polar or glacial ice ...

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  9. The change in population size at a given time interval t , is given by...

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  10. The plant of this group are adapted to live partly in water and partly...

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  11. Which one represents a mutualistic association of a fungus with roots...

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  12. If the stronger partner is benefited and the weak partner is damaged,...

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  13. The equation (Dleta NB)/(Delta NA) = B represents which of the followi...

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  14. Identify which one of the following is an example of incomplete ecosys...

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  15. Reduction in vascular tissue mechanical tissue and cuticle is charac...

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  16. If in a population, natality is balaced by mortality, then there will ...

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  17. Xerophytes are mostly

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  18. Halophytes are grown in :

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  19. Niche is defined as :

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  20. The assemblage of all the population of different species that functio...

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