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Angiosperms

Give the func...

Question

Give the function of Rhizobium, Nitrosomonas, Azotobacter, Nostoc.

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Solution

Rhizobium, Azotobacter : are nitrogen fixing bacteria and convert atmospheric nitrogen into forms usable by plants.
Nitrosomonas: cause nitrification or conversion of Ammonia into nitrites and nitrates.
Nostoc : are cyanobacteria and synthesize food through photosynthesis.

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Q. Select the correct match.
a. Nitrosomonas - Conversion of nitrite to nitrate
b. Thiobacillus - Denitrification
c. Nostoc - Free-living nitrogen-fixer
d. Azotobacter - Anaerobic nitrogen-fixer

Q. Select the correct match
1. Nitrosomonas: Nitrifying bacteria
2. Rhizobia - Free-living nitrogen fixer
3. Nostoc: Free-living nitrogen fixer
4. Azotobacter: Symbiotic nitrogen fixer

Select the matched ones:

(1)Nitrosomonas - Nitrite to nitrate

(2)Thiobacillus - Denitrification

(3)Nostoc– Free - living nitrogen-fixer

(4)Azotobacter - Anaerobic nitrogen-fixer

Q. How many of the following organisms cannot fix the atmospheric nitrogen in a free living condition?
Frankia, Anabaena, Rhodospirillum, Beijernickia, Rhizobium, Azotobacter, Nostoc

Q. How many organisms In the list given below are

N_{2}

fixer autotrophs?
Azotobacter, Chromobum, Azospirillum, Rhodospirillum, Rhizobium, Nitrobacter, Aulosira, Nostoc, Osallatona

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