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An example of symbiotic bacterium is...

An example of symbiotic bacterium is

A

Erwinia anylovora

B

Rhizobium leguminosarum

C

Xanthomonas compestris

D

Agrobacterium tumefaciens

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The correct Answer is:
B
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MODERN PUBLICATION-ECOSYSTEM -COMPETITION FILE (OBJECTIVE TYPE QUESTIONS)(A. MULTIPLE CHOICE QUESTIONS)
  1. The final stable community in ecological succession is:

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  2. The greatest problem of water conservation is to reduce the amount of

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  3. An example of symbiotic bacterium is

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

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  5. In an aquatic ecosystem, the trophic level equivalent to cows in grass...

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  6. Deserts , grasslands, forests and tundra are the examples of :

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  7. Which of the following is a free-living nitrogen fixing bacterium pres...

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  8. In plant succession, when climax community is reached, the net product...

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  9. Study the four statement (i-iv) given below and select the two correct...

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  10. The biomass available for consumption by the herbivores and the decomp...

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  11. One of the free nitrogen - fixed in paddy fields is :

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  12. the common nitrogen - fixer in paddy fields is

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  13. Which one of the following is one of the characteristics of a biologic...

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  14. Which one of the following is most appropriately defined?

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

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  16. Which of the ecological pyramids is always upright ?

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  17. Population are said to be sympatric when

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  18. A large regional unit characterised by vegetation type and associated ...

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  19. In primary succession on rocks, the pioneer species are usually:

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  20. The ''10 per cent law'' is related to:

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