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Symbiotic nitrogen fixation is found in...

Symbiotic nitrogen fixation is found in

A

Oscillatoria

B

Azotobacter

C

Nitrobacter

D

Rhizobium

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The correct Answer is:
D
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SANTRA PUBLICATION-CLASSIFICATION OF LIVING ORGANISMS-NCERT QUESTIONS
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  3. Find out what do the terms algal bloom and red tides signify.

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  4. State two economically important uses of Heterotropic bacteria

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  5. What is the nature of cell-wall in diatoms?

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  6. Describe briefly the four major groups of protozoa.

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  7. What are the characteristic features of Euglenoids?

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  8. Fungal filament system is known as mycelium. The pseudomycellum is for...

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  9. Give a brief account of viruses with respect to their structure and na...

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  10. What is phycobiont and mycobiont?

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  11. What do the therms phycobiont and mycobiont signify?

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  12. How are viroids different from viruses?

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  13. The classification of algae is based on

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  14. Write a note on economic importance of algae?

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  15. State the differences between red algae and brown algea.

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  16. Name three groups of plant that bear archegonia.

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  17. Differentiate between liverworts and moss.

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  18. Mention the ploidy of the following , prothallus cell of a fern, zytot...

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  19. What is heterospory?Give two examples.

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  20. Differences between homosporous and heterosporous pteridophyte.

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  21. Describe the important characteristics of gymnosperms.

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